Suppose you are testing the following hypotheses: H0: = 1000 Ha : ≠ 1000 Sample size is 36. The sample mean is 940. The population standard deviation is 120. The significance level is .05.
a. What are the critical z scores for the test? State the decision rule.
b. Compute the sample statistic, zstat .
c. Should you reject the null hypothesis? Explain.