SPSS t-test Tutorials – Overview

SPSS t-test

A t-test compares two means. There are three different t-tests, each of which has its own tutorial.

One-Sample T-Test

One-Sample T-Test Diagram

The one sample t-test compares the mean of one variable for one group with a given value: was the mean income over 2015 equal to $30,000,-?

Independent Samples T-Test

Independent Samples T-Test Diagram

The independent samples t test compares the means of one variable for two groups of cases. For example, did men and women have the same mean income over 2015?

Paired Samples T-Test

Paired Samples T-Test Diagram

The paired samples t-test compares the means of two variables for one group. For example, was the mean income over 2015 the same as the mean income over 2014?
The paired-samples t-test is equivalent to running a one-sample t-test on the difference scores between the two variables. The null hypothesis is that the mean population difference score is zero, which implies that the two variables have equal means.

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SPSS T-Test Tutorials

SPSS One Sample T-Test

SPSS one-sample t-test is used for testing whether the mean of one metric variable is equal to some hypothesized population value. Read More

SPSS Independent Samples T Test

SPSS independent samples t-test is a procedure for testing whether the means from two groups of cases on one metric variable are equal. The two groups are usually identified by a dichotomous variable. Read More

SPSS Paired Samples T Test

SPSS paired samples t-test is a procedure for testing whether the means of two metric variables are equal. Both variables have been measured on the same cases. Read More