A researcher wants to estimate the mean number of hours per day that elementary aged school children spend watching TV in order to direct subsequently planned research in reducing time spent watching TV among young children. She collects a sample of 424 children and calculates a 95% confidence interval for number of hours per day spent watching TV: Confidence interval - (1.93, 4.25).

a. (3pts) Interpret this confidence interval in a sentence below.

b. (5pts) Would a two-sided hypothesis test, performed at significance level 0.05, for testing whether mean number of hours per day spent watching TV is equal to 2.5. reject the null hypothesis? How about a test for mean number of hours per day being equal to 1.2? (You need to have two answers for this question. The first is for p = 2.5, and the second is for u = 1.2).