Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 pounds and a standard deviation of 3 pounds. If a dieter is selected at random, what is the probability that the dieter lost at most 7.5 pounds?
Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 pounds and a standard deviation of 3 pounds. If a dieter is selected at random, what is the probability that the dieter lost at most 7.5 pounds?
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