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Consider the following hypothesis test. H0: μ ≥ 10 Ha: μ < 10 The sample size...

Consider the following hypothesis test.

H0: μ ≥ 10

Ha: μ < 10

The sample size is 120 and the population standard deviation is 9. Use

α = 0.05.

If the actual population mean is 8, the probability of a type II error is 0.2912. Suppose the researcher wants to reduce the probability of a type II error to 0.10 when the actual population mean is 11. What sample size is recommended? (Round your answer up to the nearest integer.)

Math   Statistics-And-Probability   
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