Answered: NORMAL DISTRIBUTION. THE CHOLESTEROL…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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NORMAL DISTRIBUTION. THE CHOLESTEROL LEVEL X IN HEALTHY INDIVIDUALS IS AGE- AND SEX-DEPENDENT. FOR MALES UNDER AGE OF 21, THE AVERAGE READING OF HEALTHY INDIVIDUALS IS 160 MG/DL WITH A STANDARD DEVIATION OF 10 MG/DL. FOR MALES 21-29 YEARS OLD, THE MEAN CHOLESTEROL LEVEL IS 200 MG/DL WITH A STANDARD DEVIATION OF 30 MG/DL, AND FOR MALES 30 YEARS AND OVER, THE MEAN CHOLESTEROL LEVEL READING IS 220 MG/DL WITH A STANDARD DEVIATION OF 30 MG/DL. ASSUMING THE CHOLESTEROL LEVEL FOLLOWS A NORMAL DISTRIBUTION, FIND:

1. the percentage of males under 21 years old whose cholesterol is 170 mg/dl and above.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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