Thread: hypothesis testing

Suppose Y ~ N(mu, 225) and X represents the mean of a sample size of n=25. We wish to test the null hypothesis mu =60 with the greater than composite alternative using the rejection region {x l x > 63.8}.
A) Comput alpha(level of significance)
B) if the true value of mu = 64 compute beta

Thanks for the help

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Now is the opposite, BUT now the mean is 64.

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