Question: A cigarette company claimed that its cigarettes contain at most 40 milligrams (mg) of nicotine. 10 randomly selected cigarettes were tested. The significant level of $\alpha$ = 0.01. Test hypothesis that $\mu$ > 40 mg.

Data: 47.3, 39.3, 40.3, 38.3, 46.3, 43.3, 42.3, 49.3, 40.3, 46.3