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Today, 01:11

Human body temperatures are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F. If 19 people are randomly selected, find the probability that their mean body temperature will be less than 98.50°F.

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  1. Today, 03:41
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    Step-by-step explanation:

    Z = (x-µ) / (s/√n) = (98.5-98.2) / (0.62/√19) = 2.11

    left tail p-value = 0.9826

    so 98.26% are lower.
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