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Mathematics 20 Online
OpenStudy (anonymous):

In a certain blood test, CSI people know that the mean value of a response to a reagent is 50.0 with a standard deviation of 13.4 and that the response is normally distributed. Then in a population of 500,000 people in which the response is normally distributed, how many people (correct to the nearest hundred) might be expected to show a response level of 16.5 or lower?

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