(This problem is similar to the Chapter 9, Problem 33. However, different data will be used.) We…

(This problem is similar to the Chapter 9,
Problem 33. However, different data will be used.) We observe that people seem
to be happier when they are wearing a new article of clothing. To test this, we
provide a small random sample of our students with a new T-shirt and instruct
them to wear the shirts all day. At the end of the day, independent judges
ranked the happiness (or what social psychologists call “subjective
well-being”) of each participant. A control group of students is also judged in
terms of happiness, but without the experimental manipulation. The ratings are
below. Lower scores indicate greater happiness. Conduct a Mann–Whitney U test.
Use a two-tailed test and set α=.05.

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