Survey researchers estimate that 40% of U.S. women age 1829 save in a 401(k) or individual retirement
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Survey researchers estimate that 40% of U.S. women age 18–29 save in a 401(k) or individual retirement account. Assuming the persons surveyed to be a simple random sample of 1000 U.S. women in this age group, construct a 95% confidence interval for π = the population proportion of U.S. women in this age group who would have given the same answer if a census had been taken instead of a survey.
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