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How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? n=

How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? n=

College Algebra
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 7E
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Widows A recent study indicated that 23% of the 127 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions.
Transcribed Image Text:Widows A recent study indicated that 23% of the 127 women over age 55 in the study were widows. Round up your answers to the next whole number for the following questions.
How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? n=
Transcribed Image Text:How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows? n=
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