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If H0 : = 240 is tested against versus H1 : < 240 at the = 0.01 level of significance with a random sample of

If H0 : = 240 is tested against versus H1 : < 240 at the = 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 has dropped to 220? Assume that = 50.

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