Modern Business Statistics with Microsoft Excel (MindTap Course List)

5th Edition

ISBN: 9781285433301

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

Publisher: Cengage Learning

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Textbook Question

Chapter 6.2, Problem 23E

Time to Complete Final Exam. 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.

a. What is the probability of completing the exam in one hour or less?
b. What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
c. 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

Modern Business Statistics with Microsoft Excel (MindTap Course List)

Ch. 6.1 - The random variable x is known to be uniformly...Ch. 6.1 - The random variable x is known to be uniformly...Ch. 6.1 - Cincinnati to Tampa Flight Time. Delta Airlines...Ch. 6.1 - Prob. 4E Ch. 6.1 - 5. In October 2012, Apple introduced a much...Ch. 6.1 - 6. A Gallup Daily Tracking Survey found that the...Ch. 6.1 - 7. Suppose we are interested in bidding on a piece...Ch. 6.2 - Using Figure 6.4 as a guide, sketch a normal curve...Ch. 6.2 - A random variable is normally distributed with a...Ch. 6.2 - 10. Draw a graph for the standard normal...

Ch. 6.2 - 11. Given that z is a standard normal random...Ch. 6.2 - 12. Given that z is a standard normal random...Ch. 6.2 - 13. Given that z is a standard normal random...Ch. 6.2 - Prob. 14E Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - The mean cost of domestic airfares in the United...Ch. 6.2 - The average return for large-cap domestic stock...Ch. 6.2 - Prob. 19E Ch. 6.2 - Gasoline Prices. Suppose that the average price...Ch. 6.2 - Mensa Membership. A person must score in the upper...Ch. 6.2 - Television Viewing. Suppose that the mean daily...Ch. 6.2 - Time to Complete Final Exam. The time needed to...Ch. 6.2 - Labor Day Travel Costs. The American Automobile...Ch. 6.2 - New York City is the most expensive city in the...Ch. 6.3 - 32. Consider the following exponential probability...Ch. 6.3 - Prob. 27E Ch. 6.3 - 34. Battery life between charges for the Motorola...Ch. 6.3 - 35. The time between arrivals of vehicles at a...Ch. 6.3 - 36. Comcast Corporation is the largest cable...Ch. 6.3 - Collinas Italian Caf in Houston, Texas, advertises...Ch. 6.3 - 38. The Boston Fire Department receives 911 calls...Ch. 6 - 39. A business executive, transferred from Chicago...Ch. 6 - NCAA Scholarships. The NCAA estimates that the...Ch. 6 - Production Defects. Motorola used the normal...Ch. 6 - During early 2012, economic hardship was...Ch. 6 - The port of South Louisiana, located along 54...Ch. 6 - Service Contract Offer. Ward Doering Auto Sales is...Ch. 6 - Prob. 39SE Ch. 6 - College Admissions Test Scores. Assume that the...Ch. 6 - According to Salary Wizard, the average base...Ch. 6 - 48. A machine fills containers with a particular...Ch. 6 - Prob. 43SE Ch. 6 - Prob. 44SE Ch. 6 - Prob. 45SE Ch. 6 - 54. The time (in minutes) between telephone calls...

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Solution Summary: The author calculates the probability of completing a final examination in one hour or less, using the EXCEL software.

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