Which test is used when looking at comparison of means from a single dependent variable among...

Which test is used when looking at comparison of means from a single dependent variable among two or more groups or samples?

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Case 1 - Two Groups

If the means of a single dependent variable among groups follows normal distribution
- we do not know the population variances of two groups and assumed that the variances of two groups are not equal - Independent Samples t test
- we do not know the population variances of two groups and assumed that the variances of two groups are equal - Pooled t test
- we know the population variances of two groups Independent Samples z test
If the means of a single dependent variable among groups do not follow normal distribution - Mann-Whitney test

Case 2 - More than Two Groups

If the means of a single dependent variable among groups follows normal distribution and variances of dependent variable are equal within groups - One Way Anova
If the means of a single dependent variable among groups do not follow normal distribution - Kruskal Wallis test

milcah answered 11 months ago

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