Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, P-value, critical value(s), and state the final conclusion.
-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 29 g with a standard deviation of 3.9 g. At the 0.05 significance level, test the claim that the mean is less than 30 g.

Question

Quizplus · Accepted Answer

The Answer of Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, P-value, critical value(s), and state the final conclusion.
-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 29 g with a standard deviation of 3.9 g. At the 0.05 significance level, test the claim that the mean is less than 30 g.

Assume That a Simple Random Sample Has Been Selected from a Normally