SOLUTION: Let x be a random variable that represents the level of glucose in the blood (milligrams per deciliter of blood) after a 12 hour fast. Assume that for people under 50 years old, x

Question 861056: Let x be a random variable that represents the level of glucose in the blood (milligrams per deciliter of blood) after a 12 hour fast. Assume that for people under 50 years old, x has a distribution that is approximately normal, with mean μ = 66 and estimated standard deviation σ = 41. A test result x < 40 is an indication of severe excess insulin, and medication is usually prescribed.
(a) What is the probability that, on a single test, x < 40? (Round your answer to four decimal places.)

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

z =  = -.6341

P(z < -.6341) = 26.30%    | TI syntax is InvNorm(-.6341) 

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