Which non-parametrical test for ordinal data is the best use in the given scenario? In a study by Grape et. al, researchers investigated the possible beneficial effects of singing on well-being during...

Which non-parametrical test for ordinal data is the best use in the given scenario?

In a study by Grape et. al, researchers investigated the possible beneficial effects of singing on well-being during a single singing lesson. One of the variables of interest was the change in cortisol as a result of the singing lesson. Use the data in the following table to determine if, in general, cortisol increases after a singing lesson. Let a = 0.05. Find the p value.

a. Kruskal-Wallis Test

b. Sign Test

c. Spearman and Kendall Correlation Coefficients

d. Wilcoxon Rank Sum Test

e. Mood Median Test

f. Wilcoxon Matched-Pairs Signed-Ranks Test