Starbucks is considering introducing two new coffee-based products. In order to decide on which product to selI, they construct a taste-testing experiment. In the experiment nine coffee experts tasted...

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Extracted text: Starbucks is considering introducing two new coffee-based products. In order to decide on which product to selI, they construct a taste-testing experiment. In the experiment nine coffee experts tasted and rated the two products based on a 7 point scale (1 = extremely unpleasing, 7 = extremely pleasing) for each of four characteristics: taste, aroma, richness, and acidity. For confidentiality purposes names of the products are given as A and B. The results of the taste testing experiment are given in the table below. Expert A В C.C. 24 26 S.E. 27 27 E.G. 19 22 B.L. 24 27 С.М. 22 25 C.Ν. 26 27 G.N. 27 26 R.M. P.V. 25 22 27 23 At the 0.05 level of significance, is there evidence of a difference in the mean ratings between the two products? а. b. What assumption is necessary about the population distribution in order to perform this test? с. Determine the p-value in (a) and interpret its meaning. d. Construct and interpret a 95% confidence interval estimate of the difference in the mean ratings between the two products