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Consider a paint-drying situation in which drying time for a test specimen is normally distributed with...

Consider a paint-drying situation in which drying time for a test specimen is normally distributed with σ = 8. The hypotheses H0: μ = 73 and Ha: μ < 73 are to be tested using a random sample of n = 25 observations.

(c) For the test procedure with α = 0.005, what is β(70)? (Round your answer to four decimal places.)

(d) If the test procedure with α = 0.005 is used, what n is necessary to ensure that β(70) = 0.01? (Round your answer up to the next whole number.)
n = specimens

Math   Statistics-And-Probability   
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