# Question: Repeat the previous exercise using lower 05 For

Repeat the previous exercise, using lower? α = .05. For each true value of, is the power higher or lower?

Previous exercise

For a certain wine, the mean pH (a measure of acidity) is supposed to be 3.50 with a known standard deviation of α = .10. The quality inspector examines 25 bottles at random to test whether the pH is too low, using a left-tailed test at α = .01.

(a) What is the power of this test if the true mean is α = 3.48?

(b) If the true mean is α = 3.46?

(c) If the true mean is α = 3.44?

Previous exercise

For a certain wine, the mean pH (a measure of acidity) is supposed to be 3.50 with a known standard deviation of α = .10. The quality inspector examines 25 bottles at random to test whether the pH is too low, using a left-tailed test at α = .01.

(a) What is the power of this test if the true mean is α = 3.48?

(b) If the true mean is α = 3.46?

(c) If the true mean is α = 3.44?

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