Discuss the below:
Q1. Consider a 98% confidence interval to estimate a population mean based on a sample of 625 observations with a sample mean of 425 and a sample standard deviation of 150. How many units wide would such a confidence interval be?
Q2. In a right-tail hypothesis test situation based on 1 sample of 15 observations when the population variance is unknown the null hypothesis would be rejected at 5% significance level if the test statistic was greater than what value?