Question: Suppose we wish to test Ho: u < = 80 vs. Ha: u > 80 when the population standard deviation is known to equal 20.

Suppose we wish to test Ho: u < = 80 vs. Ha: u > 80 when the population standard deviation is known to equal 20. Suppose a sample of n = 100 measurements randomly selected from the population has a sample mean = 85.

Calculate the p-value for this test.

Use the p-value to test Ho vs. Ha at each of alpha = 0.10, 0.05, 0.01 and 0.001.

What can you conclude?

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