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Question

A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation s=6 months. To test the alternative hypothesis that μ < 22 with α = .01, 36 laptop batteries are randomly selected. Assuming that μ=24, the probability of type II error is approximately
a. -.01
b. 2.33
c. -4.33
d. 0.01
e. 0.00

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