5th Edition

ISBN: 9781285463186

Author: Jessica M. Utts, Robert F. Heckard

Publisher: Brooks Cole

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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

Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a…

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Textbook Question

Chapter 2, Problem 2.101E

Head circumferences of adult males have a bell-shaped distribution with a mean of 56cm and a standard deviation of 2 cm.

Explain whether or not it would be unusual for an adult male to have a 52-cm head circumference.
Explain whether or not it would be unusual for an adult male to have a 62-cm head circumference.

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 2, Problem 2.100E

Chapter 2, Problem 2.102E

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Chapter 2 Solutions

Mind on Statistics

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Solution Summary: The author calculates the probability of an adult male tohave 52 cm of head circumference, using a random variable x.

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