In a survey conducted by a reputable marketing agency, 271 of 1000 adults 19 years of age or older confessed to bringing

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In A Survey Conducted By A Reputable Marketing Agency 271 Of 1000 Adults 19 Years Of Age Or Older Confessed To Bringing 1 (29.12 KiB) Viewed 82 times

In a survey conducted by a reputable marketing agency, 271 of 1000 adults 19 years of age or older confessed to bringing and using their cell phone every trip to the bathroom (confessions included texting and answering phone calls). (a) What is the sample in this study? What is the population of interest? (b) What is the variable of interest in this study? Is it qualitative or quantitative? (c) Based on the results of this survey, obtain a point estimate for the proportion of adults 19 years of age or older who bring their cell phone every trip to the bathroom (d) Explain why the point estimate found in part (c) is a statistic. Explain why it is a random variable. What is the source of variability in the random variable? (e) Construct and interpret a 95% confidence interval for the population proportion of adults 19 years of age or older who bring and use their cell phone every trip to the bathroom. (f) What ensures that the results of this study are representative of all adults 19 years of age or older?