Annual income of older adults. In a study of older adults,

Chapter , Problem 8.38

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Annual income of older adults. In a study of older adults, 1444 subjects out of a total of 2733 reported that their annual income was $30,000 or more. (a) Give a 95% confidence interval for the true proportion of subjects in this population with incomes of at least $30,000. (b) Do you think that some respondents might not give truthful answers to a question about their income? Discuss the possible effects on your estimate and confidence interval.

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