Based on a random sample of 50, a 95% confidence interval for the population proportion was computed. Holding everything else constant, which of the following will reduce the length of the confidence interval by half? (CHECK ALL THAT APPLY): A. Decrease the sample proportion by half. B. Double the sample size. C. Change the confidence level to 99.7%. D. Change the confidence level to 68 %. E. Quadruple the sample size.

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 11PPS
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Based on a random sample of 50, a 95% confidence interval for the population proportion was computed. Holding
everything else constant, which of the following will reduce the length of the confidence interval by half? (CHECK ALL
THAT APPLY):
A. Decrease the sample proportion by half.
B. Double the sample size.
C. Change the confidence level to 99.7%.
D. Change the confidence level to 68 %.
E. Quadruple the sample size.
Transcribed Image Text:Based on a random sample of 50, a 95% confidence interval for the population proportion was computed. Holding everything else constant, which of the following will reduce the length of the confidence interval by half? (CHECK ALL THAT APPLY): A. Decrease the sample proportion by half. B. Double the sample size. C. Change the confidence level to 99.7%. D. Change the confidence level to 68 %. E. Quadruple the sample size.
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