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A researcher is interested in finding a 98% confidence interval for the mean number of times...

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Statistics

A researcher is interested in finding a 98% confidence intervalfor the mean number of times per day that college students text.The study included 137 students who averaged 40.7 texts per day.The standard deviation was 13.4 texts. Round answers to 3 decimalplaces where possible. a. To compute the confidence interval use adistribution. b. With 98% confidence the population mean number oftexts per day is between and texts. c. If many groups of 137randomly selected members are studied, then a different confidenceinterval would be produced from each group. About percent of theseconfidence intervals will contain the true population number oftexts per day and about percent will not contain the truepopulation mean number of texts per day.

Answer & Explanation Solved by verified expert
4.2 Ratings (827 Votes)
a since sample size is large enough z distribution will be used sample std dev s    See Answer
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