Joe Milano 11/18/22 9:27 PM This quiz: 8 point(s) Chapter 9 Question 5 of 8 possible This question: 1 point(s) possible Submit quiz A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 18.7, and the sample standard deviation, s, is found to be 4.2. (a) Construct a 90% confidence interval about u if the sample size, n, is 33. (b) Construct a 90% confidence interval about u if the sample size, n, is 63. How does increasing the sample size affect the margin of error, E? (c) Construct a 99% confidence interval about u if the sample size, n, is 33. How does increasing the level of confidence affect the size of the margin of error, E? (d) If the sample size is 13, what conditions must be satisfied to compute the confidence interval? (a) Construct a 90% confidence interval about u if the sample size, n, is 33. Lower bound: Upper bound: (Round to two decimal places as needed.) (b) Construct a 90% confidence interval about u if the sample size, n, is 63. Lower bound: : Upper bound: (Round to two decimal places as needed.) How does increasing the sample size affect the margin of error, E? A. The margin of error decreases. O B. The margin of error does not change. O C. The margin of error increases. (c) Construct a 99% confidence interval about u if the sample size, n, is 33 Lower bound: : Upper bound: Time Remaining: 00