One question on the Sullivan Statistics Survey is “Is a language other than English the primary language spoken in your home?” Treat the survey respondents as a simple random sample of adult Americans. Construct and interpret a 95% conﬁdence interval for the proportion of adult Americans who speak a language other than English at home.
Answer to relevant QuestionsA researcher wishes to estimate the proportion of households that have broadband Internet access. What size sample should be obtained if she wishes the estimate to be within 0.03 with 99% conﬁdence if (a) She uses a 2009 ...A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor afﬁrmative action programs for women and minorities for admission to colleges and universities. What sample size should be obtained ...Explain why quadrupling the sample size causes the margin of error to be cut in half. Lower bound: 15, upper bound: 35 Determine the point estimate of the population mean and margin of error for each conﬁdence interval. A Gallup poll conducted July 21–August 14, 1978, asked 1006 Americans, “During the past year, about how many books, either hardcover or paperback, did you read either all or part of the way through? ”Results of the ...
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