5. (10 points) A college counselor interviews several sophomore students about their lives outside of school. One question she asks is, "How many hours do you usually work per week at an after-school job?" Answers are given below: 25 10 12 14 21 35 20 32 18 16 24 36 10 20 12 Treating these students as a random sample of all students, test whether the mean number of hours students work per week differs from 20