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Determining Cricital Values in Two Questions

1. Compute the critical values for a 2-tailed z-test with alpha = 0.01. Explain your answer.

Sample mean = 78.47
Population mean = 75.8
Population standard deviation = 7.5
Standard error of the sample mean = .898
n= 100

2. We had to determine the critical value of z to make our accept/reject decision; In this analysis, the critical value of t is not reported. Do we need it? Why/Why not? What is it?

Solution Summary

The solution shows how to determine critical values for a z-test