A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 115, and the sample standard deviatior s, is found to be 10. (a) Construct a 95% confidence interval about u if the sample size, n, is 17. (b) Construct a 95% confidence interval about u if the sample size, n, is 24. (c) Construct a 98% confidence interval about u if the sample size, n, is 17. (d) Could we have computed the oconfidence 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. CID (a) Construct a 95% confidence interval about u if the sample size, n, is 17. 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 24. Lower bound: Upper bound: O (Use ascending order. Round to one decimal place as needed.) How does increasing the sample size affect the margin of error, E? OA As the sample size increases, the margin of error stays the same. O B. As the sample size increases, the margin of error decreases. O C. As the sample size increases, the margin of error increases. (c) Construct a 98% confidence interval about u if the sample size, n, is 17.
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 115, and the sample standard deviatior s, is found to be 10. (a) Construct a 95% confidence interval about u if the sample size, n, is 17. (b) Construct a 95% confidence interval about u if the sample size, n, is 24. (c) Construct a 98% confidence interval about u if the sample size, n, is 17. (d) Could we have computed the oconfidence 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. CID (a) Construct a 95% confidence interval about u if the sample size, n, is 17. 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 24. Lower bound: Upper bound: O (Use ascending order. Round to one decimal place as needed.) How does increasing the sample size affect the margin of error, E? OA As the sample size increases, the margin of error stays the same. O B. As the sample size increases, the margin of error decreases. O C. As the sample size increases, the margin of error increases. (c) Construct a 98% confidence interval about u if the sample size, n, is 17.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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