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EASY MULTIPLE CHOICE: Suppose that based on experience, a history of a voice disorder is assumed...

EASY MULTIPLE CHOICE: Suppose that based on experience, a history of a voice disorder is assumed to be 25% in the elderly population. However, from recent study, you believe the true percentage is at least 30%. What sample size is needed to evaluate the hypothesis that the percentage is at least 30%, with α = 0.05, β = 0.20?

A.347

B.249

C.482

D.246

math   Statistics-And-Probability   
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Sample size for one sample one-sided proportion test is,

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