A recent article inVitalitymagazine reported that the mean amount of leisure time per week for American men is 40.0 hours. You believe this figure is too large and decide to conduct your own test. In a random sample of 60 men, you find that the mean is 37.8 hours of leisure per week and that the standard deviation of the sample is 12.2 hours.

Can you conclude that the information in the article is untrue? Use the 0.05 significance level.

1. What is the decision rule?