A recent study indicated that 18% of people free from cardiovascular disease were considered obese. An investigator hypothesizes that a higher proportion of patients with a history of cardiovascular disease will be considered obese. Including 464 patients in the study would ensure that the power of the test is 80% to detect a 5% difference in the proportion with obesity.   True or False?

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A: The test statistic is 1.59 and the P-value is 0.060.

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A: n=31, μ=709.3, x¯=722.3, s=81.1

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Q: how many people should you sample? 4 80 125 382 383

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A: Denote μ as the true mean credit score.

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Q: The 90% confidence interval is from to (Round to three decimal places as needed.)

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