practice question #5. Johns Hopkins University reported in 2018 that .42 of households worldwide own at least one bicycle. We would like to come up with a confidence interval for the proportion of households worldwide that own at least one bicycle with a margin of error of .03 (for a 90% confidence interval). A. Find the sample size necessary for this using 0.42 as a preliminary estimate for p. Write formula. Round answer appropriately. ________________________ B. Repeat using the conservative value of 0.5 for p. ________________________ C. Why is it safer to use the sample size calculated in part B rather than part A?
practice question #5. Johns Hopkins University reported in 2018 that .42 of households worldwide own at least one bicycle. We would like to come up with a confidence interval for the proportion of households worldwide that own at least one bicycle with a margin of error of .03 (for a 90% confidence interval). A. Find the sample size necessary for this using 0.42 as a preliminary estimate for p. Write formula. Round answer appropriately. ________________________ B. Repeat using the conservative value of 0.5 for p. ________________________ C. Why is it safer to use the sample size calculated in part B rather than part A?
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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practice question #5. Johns Hopkins University reported in 2018 that .42 of households worldwide own at least one bicycle. We would like to come up with a confidence interval for the proportion of households worldwide that own at least one bicycle with a margin of error of .03 (for a 90% confidence interval).
A. Find the
B. Repeat using the conservative value of 0.5 for p. ________________________
C. Why is it safer to use the sample size calculated in part B rather than part A?
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