Question

Data was collected on ratings of two brands of coffee on four characteristics: taste, aroma, richness, and acidity. The distribution is unknown, but symmetric. Is there evidence of a difference in the median ratings between the two brands? Use a Wilcoxen Matched-Pairs Signed Rank Test to answer this question at a 5% significance level. Differences = Brand A - Brand B.

Brand A    Brand B
24            26
27            27
19            22
24            27
22            25
26            27
27            26
25            27
22            23

What is the value of T? _____________.


What is the critical value?______________.

Answer 1