Friedman Test

[amh]

1. What it is?

Non parametric statistic used to analyze repeated measured data

2. Usage

- It is mainly used when the assumptions of normality and homogeneity of variances are not met
- Measuring the mean scores of subjects during three or more time points.
- Measuring the mean scores of subjects under three different conditions

3. Hypothesis

Null hypothesis: there is no significant difference between the dependent groups.
Alternative hypothesis: there is a significant difference between the dependent groups.

4. The Equation
Non-tied data








)



Both tied and non-tied data

[amh]

The scenario;

Subjects are required to type a set of words in one minute. The purpose is to measure how many words can by typed in one minute. This is to measure if there significance difference between subject on how fast they can type.

Here is the result;