A random sample of 50 perceived age estimates for a model in a cigarette advertisement showed that

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A random sample of 50 perceived age estimates for a model in a cigarette advertisement showed that the sample mean and sample standard deviation were 26.22 years and 3.7432 years, respectively.
a. Use this sample to calculate a 95 percent confidence interval for the population mean age estimate for all viewers of the ad.
b. Remembering that the cigarette industry requires that models must appear at least 25 years old, does the confidence interval make us 95 percent confident that the population mean perceived age estimate is at least 25? Is the mean perceived age estimate much more than 25? Explain.
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Related Book For  answer-question

Essentials Of Business Statistics

ISBN: 9780078020537

5th Edition

Authors: Bruce Bowerman, Richard Connell, Emily Murphree, Burdeane Or

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