Question: Consider a hypothesis test with H 0 := 20 vsH 1 : 20)at= 0.05 on mean of a Normal population with unknown variance. If the

Consider a hypothesis test with H₀:= 20 vsH₁: 20)at= 0.05 on mean of a Normal population with unknown variance. If the sample variance is 4 andthe true mean is 18.5, then the sample size required to obtain a power of testat least 80% is close to 15 using an appropriate OC curve.

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