# What statistical test should I use to compare two groups?

## What statistical test should I use to compare two groups?

The two most widely used statistical techniques for comparing two groups, where the measurements of the groups are normally distributed, are the Independent Group t-test and the Paired t-test. The Independent Group t-test is designed to compare means between two groups where there are different subjects in each group.

Which type of inferential statistical test is suitable for correlational data *?

Although Pearson’s r is the most statistically powerful test, Spearman’s r is appropriate for interval and ratio variables when the data doesn’t follow a normal distribution….Correlation tests.

Correlation test Parametric? Variables
Pearson’s r Yes Interval/ratio variables
Spearman’s r No Ordinal/interval/ratio variables

### What is a chi-square test in psychology?

The chi-squared test is a non-parametric statistical test of difference or association that allows researchers to see if their results are significant. It is used for studies that have an independent groups design, where the data collected is nominal (in categories).

What is an inferential test in psychology?

inferential test any statistical procedure used to evaluate hypotheses about differences between sample and population distributions. Examples include the chi-square test, the F test, and the t test. Inferential tests more commonly are known as significance tests (see significance testing).

#### What are inferential statistical tests?

Inferential statistics requires the performance of statistical tests to see if a conclusion is correct compared with the probability that conclusion is due to chance. These tests calculate a P-value that is then compared with the probability that the results are due to chance.

Where can I find statistics for psychology students?