A middle school teacher believes that a reading rewards program results in less time to read a book after the program 2 is completed. The teacher chooses a simple random sample of students and records the time taken to read a book before starting the program and after the program is completed. The results of the study are below. What are the population parameters? Pick Before After Mean 806.9 657 What is the level of significance? Ex: 0.12 Variance 183740.293 170705.172 Observations LOO 100 Hypothesized Mean Difference 0 Is the two-sample hypothesis test a paired or unpaired t-test? Pick df 198 t Stat -2.518 P(T