Hypothesis Tests in SPSS

Often when you perform statistical tests in SPSS, the output table will contain a Sig. (2-tailed) value. This value represents the 2-tailed…

A paired samples t-test is used to compare the means of two samples when each observation in one sample can be paired…

A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two samples when the sample distributions are…

A two sample t-test is used to test whether or not the means of two populations are equal. This tutorial explains how…

A one sample t-test is used to test whether or not the mean of a population is equal to some value. This…

Many statistical tests require one or more variables to be normally distributed in order for the results of the test to be…

Levene’s Test is used to determine whether two or more groups have equal variances. It is widely used because many statistical tests use…

The Wilcoxon Signed Rank Test is the non-parametric version of the paired samples t-test. It is used to test whether or not there is a…