Question

Suppose a study was done to replicate the results of the 2003 study by Wansink et al. in Physiology & Behavior. Participants were asked to rate different food items as “comfort foods” on a scale of 1 = strongly disagree to 5 = strongly agree. Results are displayed below for participants’ ratings of “Vegetables, Casseroles, Sides” as comfort food. Is there evidence that at least one age group has a different average rating for “Vegetables, Casseroles, Sides” as comfort food?
Subject    18-34    35-54 55+

1    3    3    3

2 3 2    3

3 3    3    4

4 2    3    3

5 3    2    3

6 3    3    4

7 3    3    3

8 2    2    3

9    3 3 3

10    2 3 3

(a) State the hypotheses for the test.

(b) Use the calculator to find the test statistic and p-value of the test.

(c) Interpret the p-value and state the conclusion of the test in terms of the problem.

Answer 1