ca you explain this practice problem

32. An article describing research on the subject of the role of touch on consumer behav- iour appeared in the Journal of Consumer Research. The mean and standard deviation of the ratings of a random sample of 124 diners who were touched by male servers were 3.07 and 1.08, respectively. (The rating scale was +4 for extremely good service, 0 for neutral service, and -4 for extremely poor service.) Test the hypothesis that the population mean rating of male servers who touch their customers is three. Use the .05 level of significance