Measuring lung function: One of the measurements used to determine the health of a person's lungs is the amount of air a person can exhale under force in one second. This is called the forced...

Extracted text: Measuring lung function: One of the measurements used to determine the health of a person's lungs is the amount of air a person can exhale under force in one second. This is called the forced expiratory volume in one second, and is abbreviated FEV,. Assume the mean FEV, for 10-year-old boys is 2.1 liters and that the population standard deviation is o = 0.4. A random sample of 78 10-year-old boys who live in a community with high levels of ozone pollution is found to have a sample mean FEV, of 2.07 liters. Can you conclude that the mean FEV, in the high-pollution community differs from 2.1 liters? Use the a = 0.10 level of significance and the critical value method with the table. Part: 0 / 5 Part 1 of 5 (a) State the appropriate null and alternate hypotheses. O