4. (a) It is desired to test the null hypothesis u = 40 against the alternative hypothesis u # 40 on the basis of large a random sample from a population with o = 4. If the probability of type- error (a) is to be 0.05 and the probability of type-11 error (B) is to be 0.12 for u = 38, find the required size of the sample.

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Author:Amos Gilat
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4.
(a) It is desired to test the null hypothesis u = 40 against the alternative hypothesis u # 40 on the
basis of large a random sample from a population with o = 4. If the probability of type- error (a) is to
be 0.05 and the probability of type-11 error (B) is to be 0.12 for u = 38, find the required size of the
sample.
Transcribed Image Text:4. (a) It is desired to test the null hypothesis u = 40 against the alternative hypothesis u # 40 on the basis of large a random sample from a population with o = 4. If the probability of type- error (a) is to be 0.05 and the probability of type-11 error (B) is to be 0.12 for u = 38, find the required size of the sample.
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