Measuring lung function:

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 forced expiratory volume in one second, and is abbreviated FEV1. Assume the mean FEV1 for 10-year-old boys is 2.1 liters and that the population standard deviation is o = 0.3. A random sample of 77 10-year-old boys who live in a community with high levels of ozone pollution are found to have a sample mean FEV1 of 2.03 liters. Can you conclude that the mean FEV1 in the high-pollution community is less than 2.1 liters? Use the a = 0.10 level of significance and the P-value method with the TI-84 calculator. Part: 0 / 4 Part 1 of 4 State the appropriate null and alternate hypotheses. Ho K0 0=0 H This hypothesis test is a (Choose one) test. left-tailed right-tailed X two-tailed