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variable x will have a distribution that is approximately normal with mean ? = 80 and...

variable x will have a distribution that is approximately normal with mean ? = 80 and standard deviation ? = 21. Note: After 50 years of age, both the mean and standard deviation tend to increase. For an adult (under 50) after a 12-hour fast, find the following probabilities. (Round your answers to four decimal places.)

(a) x is more than 60


(b) x is less than 110


(c) x is between 60 and 110


(d) x is greater than 140 (borderline diabetes starts at 140)

Math   Statistics-And-Probability   
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