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A random sample of 20 observations produced a sample mean of 9.5. Find the critical and...

  1. 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 α = 0.05. Write a separate conclusion for each hypothesis. The underlying population standard deviation is known to be 3.5 and the population distribution is normal (5 points):

    1. H0: µ = 8.75; H1: µ ≠ 8.75

    2. H0: µ = 8.75; H1: µ > 8.75

Math   Statistics-And-Probability   
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