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A test is made of Ho: μ =5 ersus H1: < 5.. A sample of size...

A test is made of Ho: μ =5 ersus H1: < 5.. A sample of size n = 87 is drawn, and. sample X = 4.5. The population standard deviation is =25.
a. compute the value of the test statistic z.
b. Is Ho rejected at the a = 0.05 level ?
c. Is Ho rejected at the a = 0.01 level ?

please explain answer

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