Kizspy | Question: 47
(Choose 1 answer)
(See picture)
A. Test statistic t = -1.463. There is not sufficient evidence to support the claim that the mean is less than 30g.
B. Test statistic t = -1.263. There is not sufficient evidence to support the claim that the mean is less than 30g.
C. Test statistic t = -1.463. There is sufficient evidence to support the claim that the mean is less than 30g.
D. Test statistic t = -1.263. There is sufficient evidence to support the claim that the mean is less than 30g.
E. None of the other choices is correct
A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is actually less than 30g. The mean weight for a random sample of 16 ball bearings is 28.8g with a standard deviation of 3.8g. At the 0.05 significance level, test the claim that the mean is less than 30g. Assume that the sample has been randomly selected from a population with a normal distribution.Let t0.05.15 1.75, to.025,15= 2.13
