As a Preliminary Step in Its Product Testing, a Fast

Multiple Choice

As a preliminary step in its product testing, a fast food chain has two small groups (4 teenagers, 6 older adults) sample the item and "grade" it on "taste." Ratings were grades A to C (including + and -) .What nonparametric method is appropriate to determine if the two groups differ in opinion?

A) Wilcoxon Rank-Sum
B) Wilcoxon Signed-Rank
C) Spearman's rho
D) Kruskal Wallis
E) Kendall's tau