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2. In the study described in Statistics, the rating of pleasantness of humor was obtained on male and female subjects when humorous scenes alone. Humor First Male Female 17 9 24 12 13 20 13 18 24 23 18 18 21 21 28 32 12 12 9 12 Calculate the mean, variance, and standard deviation for each of the two groups. Which groups has pleasantness of humor? Why