a) Use R to do a complete analysis that includes a description of the data (use graphical and numerical methods to describe the data) and a significance test to compare the mean difference for the three groups. Use a level 0.05 to test the appropriate hypotheses. (Hint: Perform ANOVA)

b)Suppose the researchers are only interested in making inferences on one contrast, they want to compare the average preference of the first group to the average preference of the other two.i.What is the contrast for this situation? ii. What is the estimate of the contrast for this situation? iii. Conduct a hypothesis test to see if the true average preference of group1 is greater than the average of the other two. Use =0.05

12.22. Animals on product labels? Recall Exercise 7.50 (page 410). This experiment actually involved comparing product preference for a group of consumers that were "primed" and two groups of consumers that served as controls. A bottle of MagicCoat pet shampoo was the product, and participants indicated their attitude toward this product on a seven-point scale (from 1 = dislike very much to 7 = like very much). The bottle of shampoo had either a picture of a collie on the label or just the wording. Also, before giving a score, participants were asked to do a word-find puzzle where four of the words were common across groups (pet, grooming, bottle, label) and four were either related to the image (dog, collie, puppy, woof) or image conflicting (cat, feline, kitten, meow). A summary of the groups follows: BRANDPREF1 n Group Label with dog Dog "primed" 1 Y Y 2 Y N 3 N Y 22 20 N 10 12.22. Animals on product labels? Recall Exercise 7.50 (page 410). This experiment actually involved comparing product preference for a group of consumers that were "primed" and two groups of consumers that served as controls. A bottle of MagicCoat pet shampoo was the product, and participants indicated their attitude toward this product on a seven-point scale (from 1 = dislike very much to 7 = like very much). The bottle of shampoo had either a picture of a collie on the label or just the wording. Also, before giving a score, participants were asked to do a word-find puzzle where four of the words were common across groups (pet, grooming, bottle, label) and four were either related to the image (dog, collie, puppy, woof) or image conflicting (cat, feline, kitten, meow). A summary of the groups follows: BRANDPREF1 n Group Label with dog Dog "primed" 1 Y Y 2 Y N 3 N Y 22 20 N 10