A normal random variable X is known to have a mean of 60
Chapter , Problem 21(choose chapter or problem)
A normal random variable X is known to have a mean of 60 and a standard deviation equal to 5 (hypothesis Ho) or 8 (hypothesis Hd. (a) Consider a hypothesis test using a single sample x. Let the rejection region be of the form R = { X I Ix - 601 > 'Y } for some scalar 'Y. Determine 'Y so that the probability of false rejection of Ho is 0.1. What is the corresponding false acceptance probability? Would the rejection region change if we were to use the LRT with the same false rejection probability? (b) Consider a hypothesis test using n independent samples Xl , . , xn. Let the rejection region be of the form where 'Y is chosen so that the probability of false rejection of Ho is 0.1. How does the false acceptance probability change with n? What can you conclude about the appropriateness of this type of test? (c) Derive the structure of the LRT using n independent samples Xl, , Xn
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