Calculates the reliability of difference scores.
Calculates tests of dependent and independent means.
Converts raw scores to standard scores.
Calculates three indices of factorial invariance.
Estimates the sample size needed for a specified coefficient alpha.
Calculates standardized effect sizes.
Calculate the probability of z, t, F, and chi-square values.
Uses Spearman-Brown prophecy formula, calculates reliability of a test
Three pairwise tests to control experiment error rates.
Calculates independent/dependent t-tests from group data.
Generates random numbers from uniform/normal distributions.
Converts between correlation coefficient and Fisher
Calculates the coefficient of congruence.
Computes Parallel Analysis criteria (eigenvalues).
Calculates chi-square statistic and more.