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A recent study indicated that 27% of the 100 women over age 55 in the study were windows. How large a sample must you take to be 90% confident that the estimate is within 5% of the true proportion of women over age 55 who are widows?

A recent study indicated that 27% of the 100 women over age 55 in the study were windows. How large a sample must you take to be 90% confident that the estimate is within 5% of the true proportion of women over age 55 who are widows?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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A recent study indicated that 27% of the 100 women over age 55 in the study were windows. How large a sample must you take to be 90% confident that the estimate is within 5% of the true proportion of women over age 55 who are widows?
ney.edu/courses/16040/assignments/402774 A Maps Social Problems 8... Cal State Apply ... UThe problem mentions mean or average. Sample Proportion: P (Express as a decimal) Margin of Error: (Express as a decimal) Za/2 = invNorm(0.95, 0, 1) 1.64 Z-Score: ĝ = 1- p = 1– Round to two decimal places n = to be within 5 % of the Based on the answer above, we need a sample size of V% confident. true proportion of women over age 55 who are widows and be 90 Question Help: Message instructor Submit Question
Transcribed Image Text:ney.edu/courses/16040/assignments/402774 A Maps Social Problems 8... Cal State Apply ... UThe problem mentions mean or average. Sample Proportion: P (Express as a decimal) Margin of Error: (Express as a decimal) Za/2 = invNorm(0.95, 0, 1) 1.64 Z-Score: ĝ = 1- p = 1– Round to two decimal places n = to be within 5 % of the Based on the answer above, we need a sample size of V% confident. true proportion of women over age 55 who are widows and be 90 Question Help: Message instructor Submit Question
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