Answered: The waist circumference of males 20 to…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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5] The waist circumference of males 20 to 29 years old is approximately normally distributed with mean 92.5 cm and standard deviation 13.7 cm. Source: National Center for Health Statistics

c) Determine the waist circumferences that represent the middle 90% of all waist circumferences of 20 to 29 year old males.

d) Determine the waist circumference that is at the 10th percentile.

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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