Simple random sample 4

A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 106, and the sample standard deviation, s, is found to be 10. (a) Construct a 95% confidence interval about u if the sample size, n, is 18 (b) Construct a 95% confidence interval about u if the sample size, n, is 26 (c) Construct a 99% confidence interval about u if the sample size, n, is 18 (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 95% confidence interval about u if the sample size, n, is 18. Lower bound: : Upper bound (Use ascending order. Round to one decimal place as needed.) (b) Construct a 95% confidence interval about u if the sample size, n, is 26 Lower bound: : Upper bound (Use ascending order. Round to one decimal place as needed.) How does increasing the sample size affect the margin of error, E? O A. As the sample size increases, the margin of error stays the same O B. As the sample size increases, the margin of error increases, O C. As the sample size increases, the margin of error decreases. Click to select your answer(s). Type here to search O