1. A medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. The mean capacity of a sample of 30 nonsmokers is 5.0 litters with a sample standard deviation of 0.3 liters. What is the p-value for this question if we want to test that lung capacity is larger among nonsmokers (lung capacity of smokers is 4.0 litters)?
A. 0%
B. 30%
C. 0.3%
D. None of the above
2. A medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. The mean capacity of a sample of 30 nonsmokers is 5.0 litters with a sample standard deviation of 0.3 liters. At the 0.01 significance level, is there sufficient evidence to conclude that lung capacity is larger among nonsmokers, if lung capacity of smokers is 4.0 litters?
A. Yes
B. No
C. We cannot answer the question with the available information.