please explain

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 calied forced expiratory volume in one second, and is abbreviated FEVl. Assume the mean FEVI for 10yearold boys is 2.1 liters and that the population standard deviation is (I = 0.3. A random sampie of 77 lyearold boys who live in a community with high levels of ozone poliution are found to have a sampie mean FEV1 of 2.03 liters. Can you conclude that the mean FEV1 in the highpollution community is less than 2.1 Fiters? Use the a = 0.10 level of signicance and the Pvalue method with the 1184 calculator. Part: 014 Part 1 of 4 State the appropriate null and alternate hypotheses. mfg H1:D This hypothesis test is a (Choose one] 1' test