The Shapiro-Wilk test examines if a variable is normally distributed in a population. This assumption is required by some statistical tests such as t-tests and ANOVA.

The SW-test is an alternative for the Kolmogorov-Smirnov test. This tutorial shows how to run and interpret it in SPSS.

Read more...

A binomial test examines if a population percentage is equal to *x*.

Example: is 45% of all Amsterdam citizens currently single? Or is it a different percentage?

This simple tutorial quickly walks you through the basics.

Read more...

This tutorial walks you through running and interpreting a binomial test in SPSS.

With step-by-step example on downloadable practice data file.

Read more...

SPSS sign test for one median the right way. Recode your outcome variable into values higher and lower than the hypothesized median and test if they're distribted 50/50 with a binomial test.

Read more...

Read more...

The Mann-Whitney test is an alternative for the independent samples t test when the assumptions required by the latter aren't met by the data. The most common scenario is testing a non normally distributed outcome variable in a small sample (say, n < 25).

Read more...

Read more...

SPSS median test evaluates if two groups of respondents have equal population medians on some variable. This easy tutorial quickly walks you through.

Read more...

Read more...

A z-test for 2 independent proportions examines if some event occurs equally often in 2 subpopulations.

Example: do equal percentages of male and female students answer some exam question correctly?

This tutorial covers examples, assumptions and formulas and presents a simple Excel tool for running z-tests the easy way.

Read more...

The Kruskal-Wallis test is a nonparametric alternative for a one-way ANOVA.

This tutorial shows when to use it and how to run it in SPSS.

Read more...

SPSS Wilcoxon Signed-Ranks test is used for comparing two metric variables measured on one group of cases. It's the nonparametric alternative for a paired-samples t-test when its assumptions aren't met.

Read more...

Read more...

SPSS McNemar test is a procedure for testing whether the proportions of two dichotomous variables are equal. The two variables have been measured on the same cases.

Read more...

Read more...

SPSS sign test for two related medians tests if two variables measured in one group of people have equal population medians.

Read more...

Read more...

SPSS Friedman test compares the means of 3 or more variables measured on the same respondents. Like so, it is a nonparametric alternative for a repeated-measures ANOVA that's used when the latter’s assumptions aren't met.

Read more...

SPSS Cochran's Q test is a procedure for testing whether the proportions of 3 or more dichotomous variables are equal. These outcome variables have been measured on the same people or other statistical units.

Read more...

Read more...

## THIS TUTORIAL HAS 7 COMMENTS:

## By Andy on July 8th, 2020

Please give some public or environmental health related case study for binomial test.

## By Ruben Geert van den Berg on July 8th, 2020

What about testing if the percentage of COVID infected people is equal to

x? We're sure you can fill in the details from there, right?