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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. Select the two recommendations that would decrease the margin of error of the interval. O A. Increase the sample size. O B. Decrease the standard deviation of hours worked. O c. Use fewer degrees of freedom. O D. Decrease the confidence level. O E. Increase the confidence level. OF. Decrease the sample size.

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. Select the two recommendations that would decrease the margin of error of the interval. O A. Increase the sample size. O B. Decrease the standard deviation of hours worked. O c. Use fewer degrees of freedom. O D. Decrease the confidence level. O E. Increase the confidence level. OF. Decrease the sample size.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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. Select the two recommendations that would decrease the margin of error of the interval. A. Increase the sample size. B. Decrease the standard deviation of hours worked. C. Use fewer degrees of freedom. D. Decrease the confidence level. E. Increase the confidence level. F. Decrease the sample size. O O O
Transcribed Image Text: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. Select the two recommendations that would decrease the margin of error of the interval. A. Increase the sample size. B. Decrease the standard deviation of hours worked. C. Use fewer degrees of freedom. D. Decrease the confidence level. E. Increase the confidence level. F. Decrease the sample size. O O O
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