6th Edition

ISBN: 8220100802713

Author: Briggs

Publisher: PEARSON

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Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could co…

Normal Distribution

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Textbook Question

Chapter 6.C, Problem 33E

Pregnancy Length. Actual lengths of terms are nearly normally distributed about a mean pregnancy length (of about 38 to 39 weeks) with a standard deviation of 15 days.

33. About what percentage of births would be expected to occur within 15 days of the mean pregnancy length?

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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Chapter 6.C, Problem 32E

Chapter 6.C, Problem 34E

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Chapter 6 Solutions

EBK USING AND UNDERSTANDING MATHEMATICS

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