Chapter 13, Problem 23SE

Meat-Eating Behavior (Example 4) A researcher was interested in the ethics of eating meat, so he studied and compared ethicists (philosophy professors who taught ethics) with professors who taught other subjects to find out whether ethicists eat less meat (Schwitzgebel and Rust 2009). The subjects were asked how many meals they eat per week that include meat. The output provided are from a random sample from the full study. Vegetarians (who eat no meat) were excluded. Assume the shapes and spreads of the distributions are the same.

a. Refer to the output given. Compare the sample medians. What do they tell us about the research question?

b. Refer to the output to perform a Mann-Whitney test using a significance level of 0.05. State all four steps of a significance test.