• variability
  • Treat the mean for each group as a score, and compute the variability (again, the sum of squares) of those three scores. (wikipedia.org)
  • In practice it is rare - if not impossible - for an increase of X in a group mean to occur via an increase of each member's score by X.) This will shift the distribution X units in the positive direction, but will not have any impact on the variability within the group. (wikipedia.org)
  • parameter
  • Using the general theory of estimation and the results of Patil (1965) and Patel (1978) we give the tables of MVUE's for functions of parameter θ of trinomial, multinomial, negative-multinomial and left-truncated modified power series distributions. (eudml.org)
  • Additonally Joe explains sampling distribution as the foundation that allows us to take a sample and use it to estimate a population parameter. (lynda.com)
  • gamma
  • There are several other such variants for which the same term is sometimes used, or which clearly are generalizations of the chi-squared distribution, and which are treated elsewhere: some are special cases of the family discussed here, for example the noncentral chi-squared distribution and the gamma distribution, while the generalized gamma distribution is outside this family. (wikipedia.org)
  • differences
  • It's the mean difference…minus the null hypothesized mean difference,…divided by the standard deviation of differences…in the sample,…which is itself divided by the square root…of the number of pairs. (lynda.com)
  • The set of all those mean differences…is a sampling distribution. (lynda.com)
  • Whereas group differences indicate differing score distributions on Y, DIF explicitly involves conditioning on θ. (wikipedia.org)
  • general
  • There is no significant difference in the gender distribution between theater goers and the general college. (coursehero.com)
  • The most general form of generalized chi-squared distribution is obtained by extending the above consideration in two ways: firstly, to allow z to have a non-zero mean and, secondly, to include an additional linear combination of z in the definition of X. Note that, in the above formulation, A and B need not be positive definite. (wikipedia.org)
  • When it is being distinguished from the more general noncentral chi-squared distribution, this distribution is sometimes called the central chi-squared distribution. (wikipedia.org)
  • value
  • If our value of chi square from the formula is greater than the critical value of chi square, we reject H o and conclude that the obtained frequencies differ from the expected frequencies more than would be predicted by chance. (symynet.com)
  • Define a new random variable Q. To generate a random sample from Q, take a sample from Z and square the value. (wikipedia.org)
  • sample
  • If the number of deaths at each hospital is large (say, five or more), then the usual chi-square distribution or other large-sample approach may be used, avoiding the need for simulations that would require a large amount of computer time. (thefreedictionary.com)
  • mean
  • Locate the converted difference…in the Sampling Distribution of the Mean Difference. (lynda.com)
  • Joe discusses Sampling Distribution of the Mean Difference by defining the variables required for coverting ds to t. (lynda.com)