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A class survey in a large class for first-year college students asked, \"About how many minutes do...

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Basic Math

A class survey in alarge class for first-year college students asked, \"About how manyminutes do you study on a typical weeknight?\" The mean response ofthe 257 students was x¯¯¯x¯ = 140 minutes. Suppose that weknow that the study time follows a Normal distribution withstandard deviation σσ = 65 minutes in the population ofall first-year students at this university.

Use the survey result to give a 95% confidence interval for themean study time of all first-year students.

please explain your process. Thank you

Answer & Explanation Solved by verified expert
3.7 Ratings (473 Votes)
We have given that Sample mean 140    See Answer
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