A survey of 400 college students found that the mean number of hours students spend on...

 

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A survey of 400 college students found that the mean number of hours students spend on social media each day is 2.3 hours with a standard deviation of 0.5 hours. Hint: xt (3) a. Construct a 90% confidence interval for the mean number of hours students spend on social media. (Round final answers to three decimal places.) b. What is the margin of error you found in part (a). (Round final answer to three decimal places.) c. How many students would need to be surveyed in order to have a margin of error of 0.02? A survey of 400 college students found that the mean number of hours students spend on social media each day is 2.3 hours with a standard deviation of 0.5 hours. Hint: xt (3) a. Construct a 90% confidence interval for the mean number of hours students spend on social media. (Round final answers to three decimal places.) b. What is the margin of error you found in part (a). (Round final answer to three decimal places.) c. How many students would need to be surveyed in order to have a margin of error of 0.02?

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