A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 111, and the sample standard deviation, s, is found to be 10 (a) Construct a 98% confidence interval about u if the sample size, n, is 15. (b) Construct a 98% confidence interval about u if the sample size, n, is 11. (c) Construct a 96% confidence interval about u if the sample size, n, is 15. (d) Could we have computed the confidence intervals in parts (a)-(c) if the population had not been normally distributed? Click the icon to view the table of areas under the t-distribution (a) Construct a 98% confidence interval about u if the sample size, n, is 15. Lower bound: Upper bound (Use ascending order Round to one decimal place as needed.) Enter your answer in the edit fields and then click Check