Discuss the below:
Q: We ask whether a private school leads to higher or lower performance on a test of social skills. A sample of 100 students from a private school produces a mean of 71.30 on the test, and the national mean for students from public schools is 75.62 (σ x= 28.0).
a) Should we use a one-tailed or a two-tailed test? Why?
b) What are H0 and Ha?
c) Compute z obt
d) With α=.05 what is z crit?
e) What should we conclude about this relationship?