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A test is made of H0: = 5 versus H1: < 5. A sample of size n = 87 is drawn, and x = 4.5.

A test is made of H0: = 5 versus H1: < 5. A sample of size n = 87 is drawn, and x = 4.5. The population standard deviation is = 25.

(a.) Compute the value of the test statistic z

(b.) Is H0 rejected at the a = 0.01 level?

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