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  • populations
  • A cross-sectional study is a type of observational research that analyzes and compares populations without manipulating variables within the study environm. (reference.com)
  • data
  • The independent variables are the data collected in the survey. (wikipedia.org)
  • An example is a data set containing forecasts of one or multiple macroeconomic variables produced by multiple individuals (the first dimension), in multiple series (the second dimension) at multiple times periods (the third dimension) and for multiple horizons (the fourth dimension). (wikipedia.org)
  • Another way to structure panel data would be the wide format where one row represents one observational unit for all points in time (for the example, the wide format would have only two (left example) or three (right example) rows of data with additional columns for each time-varying variable (income, age). (wikipedia.org)
  • Levels
  • As in the text, the variable levels are simply labeled 1 and 2. (sas.com)
  • Blocking: A schedule for conducting treatment combinations in an experimental study such that any effects on the experimental results due to a known change in raw materials, operators, machines, etc., become concentrated in the levels of the blocking variable. (wikipedia.org)
  • effect
  • According to the University of New Mexico, a causal study examines a cause and effect between variables. (reference.com)
  • Independent variables are the parameters such as ingredients and processing condition which have effect on product quality. (expertsmind.com)
  • The random intercept u i represents the combined effect on y of all unobserved variables that do not change over time. (statisticalhorizons.com)
  • Sometimes, independent variables may be included for other reasons, such as for their potential confounding effect, without a wish to test their effect directly. (wikipedia.org)
  • If there was a concern that the machine traffic might have an effect on the variable being measured (e.g. death of strawberry plants), then a control treatment would receive the machine traffic but no herbicide. (wikipedia.org)
  • Error
  • This exercise proved to me that many different variable was influencing my error. (talkstats.com)
  • Can you tell us about the variable used for printer 'ineffectiveness' AKA error? (talkstats.com)
  • To be more precise, I should have said 'positional error' instead of error which are three dimensional (X, Y, Z). You mix in that another couple factor and I got over 10 dependants variables. (talkstats.com)
  • But since I'm planning to attack each one of those individually, I decided to talk about only one 1 dependant variable as general 'Error' in my question. (talkstats.com)