No.1. A random sample of 64 students in the M.A. (Pre) class made an average score of 60, with a standard deviation score of 15. Construct a 95% confidence interval estimate for the mean score of entire class. Q.No.2. A random sample size of 450 to have a mean 52 with a standard deviation of 4.5.Test the null hypotheses that the mean of the population from which the sample has been drawn is 50 against the one sided alternative that it is less than 50 at a level of significance of 5%