Statistics

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A person's level of blood glucose 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 of 74 and standard deviation of 29. What is the probability that, for an adult after a 12-hour fast, x is more than 37? haveing trouble with the formula and finding the answer, please help

  • Statistics -

    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.

  • Statistics -

    Dont know

  • Statistics -

    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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