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A middle school teacher believes that a reading rewards program results in a higher number of pages read per year after the program is completed. The teacher chooses a simple random sample of students and records the number of pages read per year before starting the program and after the program is completed. The results of the study are below. What are the population parameters? Pick v Before After Mean 813.25 904.95 What is the level of significance? Ex: 0.12 Variance 192250.25 182875.22 Observations 100 100 Hypothesized Mean Difference Is the two-sample hypothesis test a paired or unpaired t-test? Pick dif 198 t Stat 1.497 P(T