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. Use fewer degrees of freedom. B. Decrease the standard deviation of hours worked. C. Increase the sample size. D. Decrease the sample size. E. Increase the confidence level. O F. Decrease the confidence level. O O O O O O
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. Use fewer degrees of freedom. B. Decrease the standard deviation of hours worked. C. Increase the sample size. D. Decrease the sample size. E. Increase the confidence level. O F. Decrease the confidence level. O O O O O O
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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. Use fewer degrees of freedom.
B. Decrease the standard deviation of hours worked.
C. Increase the sample size.
D. Decrease the sample size.
E. Increase the confidence level.
F. Decrease the confidence level.
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