East High School has2,500 students. The high schoolwants to know if its students performed significantly lower than students in a national English test. The mean and standard deviation in the national test were 198 and 100 respectively. The students at East High School scored an average of X= 197.

A. What are H0o and Ha?

		H0o: 198198, Ha: <198198
		H0o: 198198, Ha: >198198

B. What is zobt ?

. To determine if East High School has a lower average than the national standard, should we use a one-tailed or two-tailed z-test?

		two tailed z-test
		one tailed z-test

D. If we wish to use an alpha of 0.05, what is zcrit ?

E. Using an alpha of 0.05, should we reject the null hypothesis?