A plumbing company has found that the average length of time, in minutes, for installing a bathtub is normally distributed. The plumbing company advertises that a bathtub installation takes no more than two hours. The owner of the company hires a statistician to test the company's claim. The statistician randomly selects a sample of 10 bathtub installations. The sample yielded = 150 minutes and s = 30 minutes. Perform the test of hypothesis at the α = .10 level of significance.