Product labels with animals? Participants in a study were

Chapter , Problem 16.67

(choose chapter or problem)

Product labels with animals? Participants in a study were asked to indicate their attitude toward a product on a seven-point scale (from 1 5 dislike very much to 7 5 like very much). A bottle of MagicCoat pet shampoo, with a picture of a collie on the label, was the product. Prior to indicating this preference, subjects were randomly assigned to two groups and were asked to do a word find. Four of the words were common to both groups and four were either related to the product image or conflicted with the image. The group with words related to the product image were considered primed. In Exercise 7.72 (page 469) the mean scores were compared using the two-sample t procedures. Lets use a permutation test for the comparison. Here are the data: BRANDPR Group Brand Attitude Primed 2 2 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 Nonprimed 1 1 2 2 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 5 (a) Examine the scores of each group graphically. Is it appropriate to use the two-sample t procedures? Explain your answer. (b) Perform the two-sample t test to compare the group means. Use a two-sided alternative hypothesis and a significance level of 5%. (c) Perform a permutation test to compare the group means. Summarize your results and conclusions. (d) Write a short summary comparing your results in parts (b) and (c). Which method do you recommend for these data? Give reasons for your answer. (a) State appropriate null and alternative hypotheses forthese data.(b) Report the result of the pooled two-sample t test.(c) Perform a permutation test to compare the twomeans and report the results. Compare the P-value forthis test with the P-value for the t test in part (b).(d) Find a BCa confidence interval for the differencein means. How is this interval related to your results inpart (c)?