A laptop battery lifespan follows a normal distribution with mean μ = 20 months and a standard deviation $\sigma$= 6 months.To test the alternative hypothesis that μ 20 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the power of this is approximately ________.
A)0.00
B)0.2595
C)0.2036
D)0.6449
E)0.7405

Question

A laptop battery lifespan follows a normal distribution with mean μ = 20 months and a standard deviation $\sigma$= 6 months.To test the alternative hypothesis that μ > 20 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the power of this is approximately ________.
A)0.00
B)0.2595
C)0.2036
D)0.6449
E)0.7405

Quizplus · Accepted Answer

The Answer of A laptop battery lifespan follows a normal distribution with mean μ = 20 months and a standard deviation $\sigma$= 6 months.To test the alternative hypothesis that μ > 20 with α = .05, 36 laptop batteries are randomly selected.Assuming that μ = 21, the power of this is approximately ________.
A)0.00
B)0.2595
C)0.2036
D)0.6449
E)0.7405

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

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