A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation $\sigma$ = 6 months.To test the alternative hypothesis that μ

Question

A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation $\sigma$ = 6 months.To test the alternative hypothesis that μ < 22 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the probability of type II error is approximately ________.
A)-0.65
B)0.2422
C)0.64
D)0.7422
E)0.2508

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The Answer of A laptop battery lifespan follows a normal distribution with mean μ = 22 months and a standard deviation $\sigma$ = 6 months.To test the alternative hypothesis that μ < 22 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the probability of type II error is approximately ________.
A)-0.65
B)0.2422
C)0.64
D)0.7422
E)0.2508

A Laptop Battery Lifespan Follows a Normal Distribution with Mean σ\sigmaσ

A Laptop Battery Lifespan Follows a Normal Distribution with Mean $\sigma$