Because serum cholesterol is related to age and sex, some investigators prefer to express it in terms of z-scores. If X = raw serum cholesterol, then Z X = − µ σ , where µ is the mean and σ is the standard deviation of serum cholesterol for a given age–gender group. Suppose Z is regarded as a standard normal random variable. *5.1 What is Pr(Z < 0.5)? *5.2 What is Pr(Z > 0.5)? *5.3 What is Pr(−1.0 < Z < 1.5)?
Because serum cholesterol is related to age and sex, some investigators prefer to express it in terms of z-scores. If X = raw serum cholesterol, then Z X = − µ σ , where µ is the mean and σ is the standard deviation of serum cholesterol for a given age–gender group. Suppose Z is regarded as a standard normal random variable. *5.1 What is Pr(Z < 0.5)? *5.2 What is Pr(Z > 0.5)? *5.3 What is Pr(−1.0 < Z < 1.5)?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Because serum cholesterol is related to age and sex, some
investigators prefer to express it in terms of z-scores. If X =
raw serum cholesterol, then Z X = − µ
σ , where µ is the mean
and σ is the standard deviation of serum cholesterol for a
given age–gender group. Suppose Z is regarded as a
standard normal random variable.
*5.1 What is Pr(Z < 0.5)?
*5.2 What is Pr(Z > 0.5)?
*5.3 What is Pr(−1.0 < Z < 1.5)?
Suppose a person is regarded as having high cholesterol
if Z > 2.0 and borderline cholesterol if 1.5 < Z < 2.0.
*5.4 What proportion of people have high cholesterol?
*5.5 What proportion of people have borderline cholestero
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