Explanation Given info: The breaking distances of a sedan follows normal distribution with mean 132 ft and standard deviation 4.53 ft. Calculation: The random variable x represents the breaking distances of a sedan. The breaking distance of a sedan that corresponds to bottom 20% of breaking distances represents the area of 0.20 to the right of x . Use Table 4: Standard normal distribution to find z score for 0.20. Procedure: Locate the area of 0.20 in the body of the Table 4. Move left until the first column and note the value as –0.8. Move upward until the top row is reached and note the value as 0.04. Thus, the z score is –0.84...

Elementary Statistics: Picturing the World (7th Edition)

7th Edition

ISBN: 9780134683416

Author: Ron Larson, Betsy Farber

Publisher: PEARSON

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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.

Chapter 5, Problem 5.3.50RE

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To obtain: The breaking distance of a sedan that corresponds to bottom 20% of breaking distances.

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Chapter 5, Problem 5.3.49RE

Chapter 5, Problem 5.4.51RE

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Chapter 5 Solutions

Elementary Statistics: Picturing the World (7th Edition)

Ch. 5.1 - 1. Which normal curve has the greatest mean? 2....Ch. 5.1 - The scaled test scores for the New York State...Ch. 5.1 - A U.S. adult who is at least 20 years old is...Ch. 5.1 - Find the area under the standard normal curve to...Ch. 5.1 - Find the area under the standard normal curve to...Ch. 5.1 - Find the area under the standard normal curve...Ch. 5.1 - Find three real-life examples of a continuous...Ch. 5.1 - In a normal distribution, which is greater, the...Ch. 5.1 - What is the total area under the normal curve?Ch. 5.1 - What do the inflection points on a normal...

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To obtain: The breaking distance of a sedan that corresponds to bottom 20% of breaking distances.

Solution Summary: The author explains that the breaking distance of a sedan that corresponds to bottom 20% of broken distances is 128.19 ft

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To obtain: The breaking distance of a sedan that corresponds to bottom 20% of breaking distances.

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