19th Edition

ISBN: 9780135323038

Author: Blitzer

Publisher: Pearson Custom Publishing

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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 12.4, Problem 14E

Not everyone pays the same price for the same model of a car. The figure illustrates a normal distribution for the prices paid for a particular model of a new car The mean is $17,000 and the standard deviation is $500.

Chapter 12.4, Problem 14E, Not everyone pays the same price for the same model of a car. The figure illustrates a normal

In Exercises 11-22, use the 68-95-99.7 Rule, illustrated in the figure, to find the percentage of buyers who paid

between $17,000 and $18,000.

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 12.4, Problem 13E

Chapter 12.4, Problem 15E

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Chapter 12 Solutions

THINKING MATHEMATICALLY W/ACCESS

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Solution Summary: The author calculates the percentage of people who paid between 17,000 and 18,000 using a percentage rule of normal distribution.

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