# Question

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

Previous exercise

A quality expert inspects 400 items to test whether the population proportion of defectives exceeds .03, using a right-tailed test at α = .10.

(a) What is the power of this test if the true proportion of defectives is π = .04?

(b) If the true proportion is π = .05?

(c) If the true proportion of defectives is π = .06?

Previous exercise

A quality expert inspects 400 items to test whether the population proportion of defectives exceeds .03, using a right-tailed test at α = .10.

(a) What is the power of this test if the true proportion of defectives is π = .04?

(b) If the true proportion is π = .05?

(c) If the true proportion of defectives is π = .06?

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