The Friedman test calculator is designed to determine the test statistic Q and pvalue based on the given dataset.
The Friedman test is the alternative nonparametric test to the oneway repeated measures ANOVA. It's used to check the significant difference between the ranks of three or more dependent treatments (groups).
The Friedman test is calculated using the following formula:
Q = 

∑  R^{2}_{j}  3n(k + 1) 
Where,
n = Number of subjects,
k = Number of groups (treatments),
R_{j} = The rank sum of group j.