Provide analysis of variance. Medical search. Frequent questions

Each of the PDF files below provides programs and output in SAS, SUDAAN, STATA, and WesVar for nine examples of variance estimation. (cdc.gov)
Each of the PDF files below provides programs and output in SAS and Stata for three examples of variance estimation for the 2017-2019 NSFG public-use data. (cdc.gov)

Their regression framework enables them to formulate tensor-variate analysis of variance (TANOVA) methodology. (ojp.gov)
For the criteria-related validity, regression analyses were conducted for EMR and the Positive Mental Health Scale. (bvsalud.org)
The methods covered include various types of t-test, analysis of variance and regression. (lu.se)

2020-08-13 00:00:00 2021-12-21 00:00:00 https://quickbooks.intuit.com/r/midsize-business/variance-analysis-guide/ Midsize business english What is variance analysis? (intuit.com)
The documents below (expected by December 2020) provide information on survey design and operations for 2017-2019 and reflect only minor changes and updates since 2015-2017. (cdc.gov)

Analysis of variance became widely known after being included in Fisher's 1925 book Statistical Methods for Research Workers. (wikipedia.org)
You will learn how the complex survey design of NHANES and clustering of the data affect variance estimation, which methods are appropriate to use when calculating variance for NHANES data, how to properly calculate the variance for subgroups of interest, and how to specify the sampling design parameters in common statistical software packages. (cdc.gov)
We find in Italian social security records that leave‐out estimates of a variance decomposition in a two‐way fixed effects model of wage determination yield substantially different conclusions regarding the relative contribution of workers, firms, and worker‐firm sorting to wage inequality than conventional methods. (econometricsociety.org)
Methods Data from the 2013 to 2014 National Adult Tobacco Survey (N=75 233), a landline and cellular telephone survey of US adults aged ≥18, were assessed to estimate past 30-day NCTP use, flavoured NCTP use and flavour types using bivariate analyses. (bmj.com)
Among various dimensionality reduction methods [ 16 - 24 ], principal component analysis (PCA) and linear discriminant analysis (LDA) are the two most common methods [ 21 ]. (hindawi.com)
and an introduction to nonparametric methods and survival analysis. (hu.edu.jo)
Q: When performing an analysis using Taylor Series methods, how does AM deal with single PSU's in a STRATA? (air.org)
Methods: Using data from Swedish national registries for a cohort born from 1932 to 1970 (N = 1,319,214, 48.9% women), we conducted twin-sibling biometric model fitting to examine the genetic and environmental sources of variance that contribute to the liability to alcohol-related medical conditions (AMC). (lu.se)
Furthermore, methods for filtering data often require prior estimate of noise variance. (lu.se)
Using theoretical studies and practical exercises, the course provides students with knowledge about methods for psychological research, including its relevance for psychological practice. (lu.se)

This report includes five studies: An Empirical Study of Poststratified Estimator, BRR Variance Estimation Using VPLX Hadamard Procedure, An Alternative Jackknife Variance Estimation for NAEP, On the Performance of Replication-based Variance Estimation Mathods with Small Numbers of PSUs, and An Empirical Study of the Limitation of Using SUDAAN for Variance Estimation. (ed.gov)
An approximation algorithm is provided that enables accurate computation of the estimator in very large data sets. (econometricsociety.org)
A: The plausible values procedures, as with most procedures in AM, use a variance estimator based on a Taylor-series approximation of the sampling error. (air.org)

His first application of the analysis of variance to data analysis was published in 1921, Studies in Crop Variation I, This divided the variation of a time series into components representing annual causes and slow deterioration. (wikipedia.org)
Are More Data Always Better for Factor Analysis? (ssrn.com)
This module introduces the basic concepts of variance (sampling error) estimation for NHANES data. (cdc.gov)
Firstly, using a recently developed analytic design for combined pedigree and genome-wide molecular genetic data, we test whether rare genetic variants, CNVs, and structural variants make an additional contribution to the genetic variance in intelligence, neuroticism, and extraversion. (nature.com)
When the National Center for Health Statistics (NCHS) collected the data from respondents to the National Survey of Family Growth (NSFG), those respondents were promised that the information they provided would be held "strictly confidential. (cdc.gov)
See table A , and table 1 of the 2018 PPI variance data release. (bls.gov)
Cross Validated is a question and answer site for people interested in statistics, machine learning, data analysis, data mining, and data visualization. (stackexchange.com)
Beginning with the release of data for 2011-2013 NSFG, detailed information on the survey design and operations, weighting, and variance estimation was compiled in four documents available on the NSFG website . (cdc.gov)
The benefit of auto-populating commentary is that it provides an unbiased, high-quality baseline of data. (accenture.com)
Nonpower users can easily investigate the data to perform a more detailed analysis with next-generation ad hoc query capabilities directly in the web interface. (oracle.com)
Provides the ability to extract data from your EPM application to integrate into other environments, such as a data lake, warehouse, or operational system. (oracle.com)
Now with a single source of data, variance analysis can be performed quickly. (workday.com)
Previous national data on flavoured tobacco product use among US youth and adults provide limited insight into how flavours might differ in appeal across product types and populations. (bmj.com)
National Technical Information Service, U.S. Department of Commerce, Springfield, VA. 22161 (Distributor) It should also include a disclaimer that credits any analyses, interpretations, or conclusions reached to the author (recipient of the tape) and not to NCHS, which is responsible only for the initial data. (cdc.gov)
The numerical results obtained using extensive simulation indicate that the proposed TR-KDA using BIGA (called TR-KDA-BIGA) can effectively and efficiently classify different classes of rolling element bearing data, while also providing the capability of real-time visualization that is very useful for the practitioners to monitor the health status of rolling element bearings. (hindawi.com)
Moreover, projection of high-dimensional data onto 2- or 3-dimension subspace can provide real-time visualization, which is convenient for the user to monitor the health status of rolling element bearings. (hindawi.com)
The data were subjected to the Kruskal-Wallis test for nonparametric analysis of variance. (unboundmedicine.com)
These data provide an extensive analysis of the microbial composition and relative abundance in personal inhalable poultry dust and settled poultry dust. (cdc.gov)
Provide technical leadership to guide strategic customers in successful big data implementations, architect data pipelines, become a data lake technology expert, and assist with advanced aspects of technical sales. (flexjobs.com)
Origin provides the following tools to help you summarize your continuous and discrete data. (originlab.com)
Analysis based on the table can determine whether there is a significant relationship, obtain the strength and direction of the relationship, and measure and test the agreement of matched-pairs data. (originlab.com)
It is widely used to analysis categorical data. (originlab.com)
Knowing the distribution model of the data helps you to continue with the right analysis. (originlab.com)
The short period for which data were available inhibited a solid evidence-based comparison and analysis. (who.int)
Analysis of the data collected showed that all indicators relating to the processing of various contracts and travel authorizations were within the established target times as were those for recruitment. (who.int)
Of 113 students enrolled in this study, 106 students provided pedometer and health assessment data required for inclusion in the analyses. (cdc.gov)
The expanded survey was designed in response to the critical need for a single standardized mechanism to provide health- and welfare- related population-based data at the State and local levels to track and monitor the health and well-being of children and adults. (cdc.gov)
A total of 270 khat users (129 women) in Yemen completed face-to-face interviews and provided demographic information and data on patterns of khat use, subjective mood, and sleep quality. (who.int)
Assuming continuity of the modeling function the variance is given in terms of conditional probabilities extracted from the data. (lu.se)
Being able to estimate the noise distribu- tion and its variance directly from data with no assumptions about the underlying signal function is most desirable. (lu.se)
The teaching of statistics enables students to practise their ability to perform statistical analyses, taking into account the issue and the properties of the underlying data. (lu.se)

Q: is there a specific method, which allows to extract the maximally possible sum of individual variances of a covariance matrix, and if there is a special method, how is it defined? (stackexchange.com)
Analysis of variance and covariance of postintervention use and intention to use HPDs and a meta-analytic test were done. (cdc.gov)

Laplace knew how to estimate a variance from a residual (rather than a total) sum of squares. (wikipedia.org)
If the DEFF is 1, the variance for the estimate under the cluster sampling is the same as the variance under simple random sampling. (cdc.gov)
Statistical software that accounts for the sampling design effect must be used to calculate an asymptotically unbiased estimate of the variance and should be used for all statistical tests and the construction of confidence limits. (cdc.gov)
The estimate of the lab variance component in g2 just happens to be 0 (the peak of the likelihood profile is at 0). (ethz.ch)

In general, using statistical weights that reflect the probability of selection and propensity of response for sampled individuals will affect parameter estimates, while incorporating the attributes of the complex sample design (i.e. differential weighting, clustering and stratification) will affect variance estimates (estimated standard errors and thereby test statistics and confidence intervals). (cdc.gov)
For a complex sample survey such as NHANES, variance estimates computed using standard statistical software packages that assume simple random sampling are generally too low (i.e., significance levels are overstated) and biased because they do not account for the differential weighting and the correlation among sample persons within a cluster. (cdc.gov)
Standard statistical software packages that assume simple random sampling calculate variance estimates that are generally too low and biased because they do not account for differential weighting and the correlation among sample persons within a cluster. (cdc.gov)
The impact of the complex sample design upon variance estimates is measured by the design effect (DEFF). (cdc.gov)
Variance of estimates (sampling errors) should be calculated for all survey estimates to aid in determining statistical reliability. (cdc.gov)
I don't know why you think a model is better if the estimates of its variance components are non-zero. (ethz.ch)

begingroup$ I wonder why you want to chase and remove as much as possible of item-specific variance. (stackexchange.com)

Advanced statistical analysis tools, such as repeated measures ANOVA, multivariate analysis, receiver operating characteristic (ROC) curves, power and sample size calculations, and nonparametric tests are available in OriginPro. (originlab.com)

Analysis of variance (ANOVA) is a collection of statistical models and their associated estimation procedures (such as the "variation" among and between groups) used to analyze the differences among means. (wikipedia.org)
ANOVA is based on the law of total variance, where the observed variance in a particular variable is partitioned into components attributable to different sources of variation. (wikipedia.org)
In its simplest form, ANOVA provides a statistical test of whether two or more population means are equal, and therefore generalizes the t-test beyond two means. (wikipedia.org)
In statistics, analysis of variance is sometimes abbreviated to ANOVA. (intuit.com)
Origin provides a number of options for performing general statistical analysis including: descriptive statistics, one-sample and two-sample hypothesis tests, and one-way and two-way analysis of variance (ANOVA). (originlab.com)

A successful grouping will split dogs such that (a) each group has a low variance of dog weights (meaning the group is relatively homogeneous) and (b) the mean of each group is distinct (if two groups have the same mean, then it isn't reasonable to conclude that the groups are, in fact, separate in any meaningful way). (wikipedia.org)
See also the section "Sample Weights and Variance Estimation" in the 2017-2019 NSFG User's Guide pdf icon [PDF - 442 KB] for more information. (cdc.gov)
Using the stochastic representation we derive the mean and variance of the estimated weights of TP which are of key importance in portfolio analysis. (lu.se)
Furthermore, we provide the asymptotic distribution of the linear combination of the estimated TP weights under the high-dimensional asymptotic regime, i.e., the dimension of the portfolio p and the sample size n tend to infinity such that p/n→c∈(0,1). (lu.se)

Ronald Fisher introduced the term variance and proposed its formal analysis in a 1918 article on theoretical population genetics,The Correlation Between Relatives on the Supposition of Mendelian Inheritance. (wikipedia.org)
Origin provides both parametric and non-parametric measures of correlation. (originlab.com)

Both EMR and BFP showed similar abilities to explain the external criterion, and the BFP accounted for 10% of the residual variance. (bvsalud.org)
Comparing the predicted residual errors with those de- rived from a linear model assumption provides a signal for nonlinearity. (lu.se)

The vision was to create a single standardized and centralized pre-close variance report that was easily accessible across controllership and provide the ability for controllers to add commentary and document their review. (accenture.com)

Performing variance analysis enables controllership to ensure large or inconsistent trends in balances are identified, investigated and actioned, if necessary. (accenture.com)

Variances can be broadly classified into four main categories with corresponding sub-categories. (intuit.com)

In meta-analysis, the calculation of the RR includes a weighting on each trial's variance's inverse. (bmj.com)
It explains that the raw calculation doesn't provide the same result. (bmj.com)
After starting the calculation by clicking OK an analysis of variance is performed for each selected dependent variable. (maxqda.com)
A prerequisite for the calculation of a variance analysis is the homogeneity of variance within the single factor levels. (maxqda.com)

Accordingly, variance analysis is the practice of extracting insights from the variance numbers to make more informed budgeting decisions in the future. (intuit.com)
Our project team then enhanced the pre-close variance report with added capability that provides end users with more insights on variances by enabling them to drill down into the lower-level line item source for a specific variance. (accenture.com)
The organisational capabilities in Workday enable easier income statement analysis by cost centre, leading to increased insights and support for managers. (workday.com)

The column "df" provides information on the number of degrees of freedom and allows conclusions on the number of groups that are defined by the factor. (maxqda.com)
Conclusions: A moderate-to-substantial proportion of genetic and environmental variance that contributes to AMC risk is not shared with AUD, underscoring the need for additional gene identification efforts for AMC. (lu.se)

Learn how to control costs and get better insight into your company's financial health in this easy-to-follow variance analysis guide from QuickBooks. (intuit.com)
Analyzes and evaluates the company's operating results to prepare detailed variance reports. (flexjobs.com)

As shown by the second illustration, the distributions have variances that are considerably smaller than in the first case, and the means are more distinguishable. (wikipedia.org)
These reviews can provide useful information for healthcare professionals and policymakers on the burden of disease, show changes and trends over time in disease, and inform geographical distributions of disease and conditions. (lww.com)

General intelligence has been found to be heritable, with twin and family studies estimating that 50 to 80% [ 5 ] of phenotypic variance is due to additive genetic factors, a proportion that increases with age from childhood to adulthood [ 6 ]. (nature.com)
Shades of grey inside each neuron show the proportion of variance due to the various task parameters (e.g. stimulus, decision, and time), illustrating mixed selectivity. (elifesciences.org)
A higher proportion of total environmental variance was unique to AMC: 76.7% for women and 77.2% for men. (lu.se)

The NSFG Cycle 6 questionnaires contained a number of items designed to provide a comprehensive description of current and past behavior related to the risk of acquiring sexually transmitted infections (STI), including the Human Immunodeficiency Virus, or HIV, the virus that causes AIDS. (cdc.gov)

He provided an overview of BDO's methodology for identifying and adapting to these changes with a myriad of support services, including Integration, Organizational Change Management, Project Management and Execution, and related best practices. (bdo.com)
Prevalence and incidence systematic review and meta-analysis is an emerging methodology in the field of evidence synthesis. (lww.com)

Deficient VARs are crucial hindrances to disciplined Earned Value Management (EVM), while properly developed VARs provide management the early insight required to implement timely and impactful corrective actions. (bdo.com)

The simplest definition of variance is a discrepancy between what you planned to spend and your actual numbers. (intuit.com)

For personality traits these effects are smaller, with 34-48% of the variance being explained by genetic differences. (nature.com)
This paradox, that cognitive ability and personality appear to be under selective pressure yet retain heritable variation, could be resolved if rare variants, which are less amenable to selection, are found to play a major role in the genetic contribution to variance in these traits. (nature.com)
They proved through factorial analysis that these five factors were a sufficient representation of all human personality framework traits. (bvsalud.org)

In some cases, this can be a variable overhead variance that occurs when there is a discrepancy between your actual variable overhead and the standard variable overhead. (intuit.com)
The interim order specified by this notice becomes effective on November 20, 2023 and shall remain in effect until it is modified or revoked, or until OSHA publishes a decision on the permanent variance application, whichever occurs first. (osha.gov)

Depending on your goals, you can analyze any of the following variances to optimize your operational performance. (intuit.com)
A 10-fold cross-validation demonstrated similar performance in each analysis. (jmir.org)
2021). The SFWST Geologic Disposal Safety Assessment (GDSA) work package is charged with developing a disposal system modeling and analysis capability for evaluating generic disposal system performance for nuclear waste in geologic media. (sandia.gov)
BDO's senior associate Roupenn Sayadian discussed how Variance Analysis Reports (VAR) include specific information about the cause, impact and corrective actions associated with program performance metrics that deviate from the Performance Measurement Baseline (PMB). (bdo.com)
Lead, hire and coach team of engineers, providing mentorship with a focus on growth, as well as support through non-performance. (flexjobs.com)
The KNN classifier provided the best performance for overall accuracy. (cdc.gov)
It would provide a natural step prior to any modeling of a system (e.g. artificial neural network) since one then knows the optimal performance limit of the fit in advance. (lu.se)

This capability eliminates the need for users to leave the report and go into the SAP system to find the cause of a variance or to validate the automated commentary. (accenture.com)
The Bid and Project Management (BPM) stream within the Thales UK Graduate Development Programme (GDP) has been designed to provide a diverse and robust understanding of bid and project management capability within Thales UK. (targetjobs.co.uk)

OSHA invites the public to submit comments on the variance application to assist the agency in determining whether to grant the applicants a permanent variance based on the conditions specified in this notice. (osha.gov)
Provide technical leadership, architect production level workloads, and assist Solution Architects. (flexjobs.com)
Assist solution architects with technical sales and provide training to improve community adoption. (flexjobs.com)

All comments, including any personal information you provide, are placed in the public docket without change, and may be made available online at https://www.regulations.gov . (osha.gov)

Discrete frequency analysis is one common method to analyze discrete variables. (originlab.com)

Pedigree-based analyses of intelligence have reported that genetic differences account for 50-80% of the phenotypic variation. (nature.com)
In our models, genetic variants in low LD with genotyped SNPs explain over half of the genetic variance in intelligence, education, and neuroticism. (nature.com)

In this article, we'll explore the different types of variances and how analyzing them can help you take control of your budget. (intuit.com)
The scores from different types of cognitive ability tests correlate positively and the variance that is shared between tests is termed general intelligence, general cognitive ability, or g [ 1 ]. (nature.com)
These examples are intended to cover many of the common types of variance estimation you may do in your analyses. (cdc.gov)
These examples cover some of the basic types of variance estimation you may do in your analyses. (cdc.gov)
The aim of this article is to provide guidance for conducting these types of reviews. (lww.com)

ABSTRACT To provide information about the level of patient satisfaction with the dental care provided at the Faculty of Dentistry at Ajman University, 135 randomly selected patients, 50 males and 85 fe- males, were surveyed. (who.int)

Global sea surface temperature analyses: Multiple problems and their implications for climate analysis, modeling, and reanalysis. (ametsoc.org)

Position maintains third-party liability accounts and completes variance financial analysis. (hfma.org)

Provide tutorials and training to. (flexjobs.com)

Are you talking about what is known in FA as unique variance (uniqueness) as opposed to common variance (communality)? (stackexchange.com)
For articles published under an open access Creative Common CC BY license, any part of the article may be reused without permission provided that the original article is clearly cited. (mdpi.com)

Applications include analysis of variance and tests of linear restrictions in models with many regressors. (econometricsociety.org)

Estimating specific variance for items in factor analysis - how to achieve the theoretical maximum? (stackexchange.com)
I spot-checked several articles, and none of them provide a specific citation for this term. (stackexchange.com)
The six indicators mainly represent a measure of the time needed to process specific transactions related to expenditure and personnel and do not attempt to assess either cost or quality of the services provided. (who.int)
Furthermore, the prominent influence of environmental factors specific to AMC provides a promising area for the identification of prevention targets. (lu.se)

Another way to evaluate labor variance is by analyzing your labor costs. (intuit.com)

A: When you have a single PSU in a stratum, you cannot calculate the within-stratum variance. (air.org)

These results support EAC early diagnosis trials using exhaled aldehyde analysis. (nature.com)
Provides analyses of the monthly results to the budget, forecast and prior years. (flexjobs.com)
The results table includes all the major results of the variance analysis. (maxqda.com)
The analysis results revealed that for a large portion of missing values (40%), the proposed method can generate a fused dataset that provides reliable risk assessment results highly consistent (70%87%) with those obtained from the original experimental datasets. (cdc.gov)

Variance analysis is the practice of evaluating the difference between budgeted costs and actual costs within your business. (intuit.com)
Contribution to the discipline: this study provides subsidies for a safe nursing practice, based on scientific evidence, which may support the implementation of more purposeful intervention models for nurses working in intensive care units. (bvsalud.org)

Provides support for other third-party requests both internal and external. (hfma.org)
Users can easily create new dashboards with a point-and-click designer or manipulate existing dashboards to support their analysis and tasks at hand. (oracle.com)
The Finance Manager / Senior Manager will provide professional financial and commercial support service to the respective business unit, service line and PS management team. (showbizjobs.com)
Provide other administrative support as needed. (workopolis.com)
MSU clients, in general, welcomed the objectives of the new system but expressed some dissatisfaction with the support functions as currently provided. (who.int)

These analyses indicated that the intervention significantly increased use of HPDs but had no effect on intention to use HPDs in the future. (cdc.gov)

Reports can be used interactively to provide analysis and drill-to-source, or can be run in report books. (oracle.com)

R-meta] AICc or variance components, which one matters more? (ethz.ch)
So, from the perspective of variance components, g1 seems like a better model. (ethz.ch)
or the variance components)? (ethz.ch)
I (mis)interpreted it as asking for a reference for why $k$ number of components explained $X%$ of variance. (stackexchange.com)
i ) Fraction of variance captured by the first 20 principal components. (elifesciences.org)
c ) Principal component analysis linearly maps the firing rates into a few principal components such that a second linear transformation can reconstruct the original firing rates. (elifesciences.org)

Hence only a principal component analysis is needed in empirical work. (ssrn.com)
e ) Demixed principal component analysis also compresses and decompresses the firing rates through two linear transformations. (elifesciences.org)

While a minimum amount of 1000 ppm is required to provide the preferred benefit of strengthening tooth enamel, excess amounts of fluorine are associated with health risks, such as dental fluorosis. (fluoridealert.org)

It is defined as the ratio of the variance of a statistic which accounts for the complex sample design to the variance of the same statistic based on a hypothetical simple random sample of the same size. (cdc.gov)
These tools enable direct comparison of models across paradigms and provide a mechanism for measuring and discussing complexity based on a model's fundamental assumptions and design. (sandia.gov)
Effectiveness of the intervention was determined through the sequence of analyses recommended by Braver and Braver (1988) for the Solomon Four-Group Design. (cdc.gov)
Title : Responsive design, weighting, and variance estimation in the 2006-2010 National Survey of Family Growth Personal Author(s) : Lepkowski, James M.;Mosher, William D.;Groves, Robert M.;Brady T. West,;Wagner, James. (cdc.gov)

We've crunched the numbers, found huge variance and concluded that great caution is warranted. (home.saxo)

SUMMARY: In this notice, OSHA announces the application of NASA's Neutral Buoyancy Laboratory Operations Contract (NOC or ``the applicants'') for a permanent variance and interim order from a provision of the OSHA standard that regulates commercial diving operations, presents the agency's preliminary finding on NOC's application, and announces the granting of an interim order. (osha.gov)

Let's say a mechanic anticipated $10,000 in profits for one month but generated $8,000, that would be a $2,000 unfavorable variance. (intuit.com)
Suppose it's determined through a variance analysis that the fluctuation in anticipated profits can be traced to rising costs of automobile parts. (intuit.com)

Our Finance and Global IT teams collaborated with Internal Controls to make the pre-close variance process and reporting digital, automated and intelligent. (accenture.com)

This allows you to set the default weight, strata, and cluster identifiers, which will be automatically included in each analysis, unless you specify otherwise. (air.org)

Most were satisfied with the care provided except for explanation of treatment options and the remote- ness of the clinic. (who.int)

Anatomy8

Organisms4

Diseases8

Chemicals and Drugs6

Analytical, Diagnostic and Therapeutic Techniques and Equipment101

Psychiatry and Psychology37

Phenomena and Processes88

Disciplines and Occupations7

Anthropology, Education, Sociology and Social Phenomena13

Technology, Industry, Agriculture7

Humanities1

Information Science15

Named Groups8

Health Care69

Geographicals3

Examples of variance estimation2

Regression3

20202

Methods10

Estimator3

Data31

Covariance2

Estimate4

Estimates6

Begingroup1

Nonparametric1

ANOVA5

Weights4

Correlation2

Residual2

Single standardized1

Enables1

Broadly1

Calculation4

Insights3

Conclusions2

Company's2

Distributions2

Proportion3

Behavior1

Methodology2

Insight1

Simplest1

Traits3

Occurs2

Performance7

Capability2

Assist3

Https1

Analyze1

Genetic2

Types5

Abstract1

Implications1

Liability1

Tutorials1

Common2

Include1

Specific4

Evaluate1

Calculate1

Results4

Practice2

Support5

Significantly1

Reports1

Components6

Principal componen2

Amounts1

Design4

Numbers1

Application1

Profits2

Make1

Cluster1

Explanation1