In the paper "Measurement of Ethical Food Choice Motives" (Appetite, Vol. 34, pp. 55-59), research psychologists M. Lindeman and M. Väänänen of the University of Helsinki published a study on the factors that most influence peoples' choice of food. One of the questions asked of the participants was how important, on a scale of 1 to 4 (1 = not at all important, 4 = very important), is ecological welfare in food choice motive, where ecological welfare includes animal welfare and environmental protection. Following are the responses of a random sample of 18 Helsinkians.

At the 5% significance level, do the data provide sufficient evidence to conclude that, on average, Helsinkians respond with an ecological welfare food choice motive greater than 2?
a. Use the Wilcoxon signed-rank test.
b. Use the t-test.
c. Compare the results of the two tests.

Transcribed Image Text:

3 31 3 4 2 3 1