Compare groups

Compare Groups examines independent samples and makes inferences about the differences between them.

Independent samples occur when observations are made on different sets of items or subjects. If the values in one sample do not tell you anything about the values in the other sample, then the samples are independent. If the knowing the values in one sample could tell you something about the values in the other sample, then the samples are related.

• Side-by-side univariate plots
  Side-by-side univariate plots summarize the distribution of data stratified into groups.
• Equality of means/medians hypothesis test
  An equality hypothesis test formally tests if two or more population means/medians are different.
• Equivalence of means hypothesis test
  An equivalence hypothesis test formally tests if two population means are equivalent, that is, practically the same.
• Difference between means/medians effect size
  An effect size estimates the magnitude of the difference between two means/medians.
• Multiple comparisons
  Multiple comparisons make simultaneous inferences about a set of parameters.
• Mean-Mean scatter plot
  A mean-mean scatter plot shows a 2-dimensional representation of the differences between many means.
• Homogeneity of variance hypothesis test
  A homogeneity hypothesis test formally tests if the populations have equal variances.