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5. Assume that weekly screen time follows a normal distribution with a std for 5 hours. During a survey, 125

people were asked about the number of hours they watched the screen during the last week the average answer was 21 hours

A. Based on this survey construct a 95% confidence interval for the weekly number of screen hours


B. What should be the sample size that will ensure that the margin of error will not be higher than 0.5 for a confidence interval of 95%

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Answers are a) 95% confidence... View the full answer

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