Posted by Alex on Sunday, June 20, 2010 at 11:13am.
Z = (score - mean)/SD
Z = (37-74)/29 = -1.28
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion for that Z score.
Dont know
A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after a 12-hour fast, the random variable x will have a distribution that is approximately normal with mean μ = 89 and standard deviation σ = 26. 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)
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