A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, )2, is found to be 105, and the sample standard deviation, s, is found to be 10. (a) Construct a 95% condence interval about u if the sample size, n, is 20. (b) Construct a 95% confidence interval about u if the sample size, n, is 16. (0) Construct an 80% condence interval about u if the sample size, n, is 20. (d) Could we have computed the condence intervals in parts (a)(c) if the population had not been normally distributed? 3 Click the icon to view the table of areas under the tdistribution