6th Edition

ISBN: 9780321867322

Author: Robert F. Blitzer

Publisher: PEARSON

Concept explainers

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 12.4, Problem 15E

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 15E, 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 $16,000 and $17000.

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 14E

Chapter 12.4, Problem 16E

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Chapter 12 Solutions

Thinking Mathematically (6th Edition)

Ch. 12.1 - CHECK POINT 1 A city government wants to conduct a...Ch. 12.1 - CHECK POINT 2 Explain why the sampling technique...Ch. 12.1 - CHECK POINT 3 Construct a frequency distribution...Ch. 12.1 - CHECK POINT 4 Use the classes in Table 12.3 to...Ch. 12.1 - CHECKPOINTS 5 Construct a stem-and-leaf plot for...Ch. 12.1 - A sample obtained in such a way that every member...Ch. 12.1 - Prob. 2CVC Ch. 12.1 - Fill in each blank so that the resulting statement...Ch. 12.1 - 4. Data can be displayed using a bar graph with...Ch. 12.1 - Prob. 5CVC

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Solution Summary: The author calculates the percentage of people who paid between 16,000 and 17,000 using a percentage rule of normal distribution.

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