17th Edition

ISBN: 9781259924163

Author: Lind

Publisher: MCGRAW HILL BOOK COMPANY

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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 10, Problem 17E

The amount of water consumed each day by a healthy adult follows a normal distribution with a mean of 1.4 liters. A health campaign promotes the consumption of at least 2.0 liters per day. A sample of 10 adults after the campaign shows the following consumption in liters:

Chapter 10, Problem 17E, The amount of water consumed each day by a healthy adult follows a normal distribution with a mean

At the .01 significance level, can we conclude that water consumption has increased? Calculate and interpret the p-value.

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 10, Problem 16E

Chapter 10, Problem 18E

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Chapter 10 Solutions

EBK STATISTICAL TECHNIQUES IN BUSINESS

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Solution Summary: The author concludes that there is no evidence to conclude that water consumption has increased.

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Chapter 10 Solutions