Essentials of Modern Business Statistics with Microsoft Office Excel (Book Only)

7th Edition

ISBN: 9781337298353

Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams

Publisher: South-Western College Pub

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Textbook Question

Chapter 6.2, Problem 23E

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions.

What is the probability of completing the exam in one hour or less?
What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time?

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 6.2, Problem 22E

Chapter 6.2, Problem 24E

Chapter 6 Solutions

Essentials of Modern Business Statistics with Microsoft Office Excel (Book Only)

Ch. 6.1 - The random variable x is known to be uniformly...Ch. 6.1 - Delta Airlines quotes a flight time of 2 hours, 5...Ch. 6.1 - Prob. 4E Ch. 6.1 - In October 2012, Apple introduced a much smaller...Ch. 6.2 - A random variable is normally distributed with a...Ch. 6.2 - Prob. 12E Ch. 6.2 - Prob. 15E Ch. 6.2 - Prob. 19E Ch. 6.2 - The time needed to complete a final examination in...Ch. 6.2 - New York City is the most expensive city in the...

Ch. 6.3 - Prob. 29E Ch. 6.3 - Wendy's restaurant has been recognized for having...Ch. 6 - Prob. 33SE Ch. 6 - The port of South Louisiana. located along 54...Ch. 6 - Prob. 45SE Ch. 6 - Specialty Toys Specialty Toys, Inc. sells a...Ch. 6 - Specialty Toys Specialty Toys, Inc. sells a...Ch. 6 - Specialty Toys Specialty Toys, Inc. sells a...Ch. 6 - Gebhardt Electronics Gebhardt Electronics produces...Ch. 6 - Gebhardt Electronics Gebhardt Electronics produces...Ch. 6 - Gebhardt Electronics Gebhardt Electronics produces...

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Solution Summary: The author explains that the time needed to complete a final examination is normally distributed with the mean of 80 minutes.

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