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In a random sample of eighteen people, the mean time at lunch was... In a random sample of eighteen people, the mean time at lunch

In a random sample of eighteen people, the mean time at lunch was...

In a random sample of eighteen people, the mean time at lunch was 35.6 minutes with a standard deviation of 8.2 minutes.Assuming the data are normally distributed, what would be the 85% confidence interval?

the answer is wrong that your "Expert put"

38.82, 38.38 is wrong

Correct Answer is 32.69, 38.51

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