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In a random sample of 39 individuals, the average number of minutes spent exercising each week...

In a random sample of 39 individuals, the average number of minutes spent exercising each week was 124.7 minutes with a population standard deviation of 34.3 minutes. Find the 91% confidence interval for the mean. Show your work to receive credit

Math   Statistics-And-Probability   
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Answer #1

Note : Here, t-critical value is used.

If z -critical value is used the confidence interval is (115.363 , ​​​​​​134.037)

final answers are rounded to 3 decimals

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