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In a survey conducted by the Gallup​ Organization, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the​ results, a​ 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval.   A. Increase the sample size.                                                                                                                                          B. Decrease the sample size.                                                                                                                                        C. Increase the confidence level  D. Decrease the standard deviation of hours worked. E. Use fewer degrees of freedom.

In a survey conducted by the Gallup​ Organization, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the​ results, a​ 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval.   A. Increase the sample size.                                                                                                                                          B. Decrease the sample size.                                                                                                                                        C. Increase the confidence level  D. Decrease the standard deviation of hours worked. E. Use fewer degrees of freedom.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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In a survey conducted by the Gallup​ Organization, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the​ results, a​ 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval.
 
A. Increase the sample size.                                                                                                                                          B. Decrease the sample size.                                                                                                                                        C. Increase the confidence level 
D. Decrease the standard deviation of hours worked.
E. Use fewer degrees of freedom.
F. Decrease the confidence level.
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