Solve the problem.
-A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that
the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.6 g
with a standard deviation of 4.4 g. At the 0.05 significance level, test the claim that the sample comes from a
population with a mean weight less than 30 g. Use the traditional method of testing hypotheses.

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The Answer of Solve the problem.
-A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that
the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.6 g
with a standard deviation of 4.4 g. At the 0.05 significance level, test the claim that the sample comes from a
population with a mean weight less than 30 g. Use the traditional method of testing hypotheses.

Solve the Problem. -A Manufacturer Makes Ball Bearings That Are Supposed to Have