Question 4 of 7 (1 point) Attempt 1 of Unlimited View question in a popun 7.1 Section Erde 15
Overweight Men For a random sample of 60 overweight men, the mean of the number of pounds that they were overweight was
30. The standard deviation of the population is 3.8 pounds. Use a graphing calculator and round the final answers to one decimal
place.
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Part 1 of 4
The best point estimate of the mean is
pounds.

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.