Question: If H 0 : = 240 is tested against H 1 : < 240 at the = 0.01 level of significance with

If H0: μ = 240 is tested against H1: μ < 240 at the α = 0.01 level of significance with a random sample of twenty-five normally distributed observations, what proportion of the time will the procedure fail to recognize that μ has dropped to 220? Assume that σ = 50.

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