Question: A random sample of 20 observations produced a sample mean of 9.5. Find the critical and observed z-values for each of the following and test

A random sample of 20 observations produced a sample mean of 9.5. Find the critical and observed z-values for each of the following and test each hypothesis at= 0.05. Write a separate conclusion foreach hypothesis. The underlying population standard deviation is known to be 3.5 and the population distribution is normal. H0: = 8.75; H1: 8.75 and H0: = 8.75; H1: > 8.75

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