An online math tutor service would like to claim that the average time spent taking a standardized test after students go through tutoring is less than the average time spent before going through tutoring. A simple random sample of students takes a pre-test, then goes through tutoring and takes a post-test. Results of the sample are shown below. Is the two-sample hypothesis test a paired t-test or an unpaired t-test? Mean Variance Observations Pearson Correlation Hypothesized Mean Difference. Before 82.333 110.118 After 74.944 199.820 What are the population parameters? 18 18 Pick 0.727 0 df 17 t Stat -3.227 P(T