Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card)

6th Edition

ISBN: 9780357228708

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

Publisher: Cengage Learning US

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Addition Rule of Probability

It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.

Expected Value

When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known …

Probability Distributions

Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosi…

Basic Probability

The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the prob…

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Textbook Question

Chapter 7, Problem 54SE

Lori Jeffrey is a successful sales representative for a major publisher of college textbooks. Historically, Lori obtains a book adoption on 25% of her sales calls. Viewing her sales calls for one month as a sample of all possible sales calls, assume that a statistical analysis of the data yields a standard error of the proportion of .0625.

a. How large was the sample used in this analysis? That is, how many sales calls did Lori make during the month?
b. Let p ¯ indicate the sample proportion of book adoptions obtained during the month. Show the sampling distribution of p ¯ .
c. Using the sampling distribution of p ¯ , compute the probability that Lori will obtain book adoptions on 30% or more of her sales calls during a one-month period.

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 7, Problem 53SE

Chapter 7, Problem 1CP

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Chapter 7 Solutions

Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card)

Ch. 7.2 - Consider a finite population with five elements...Ch. 7.2 - Assume a finite population has 10 elements. Number...Ch. 7.2 - The 2012 American League consists of 14 baseball...Ch. 7.2 - The U.S. Golf Association has instituted a ban on...Ch. 7.2 - In this section we used a two-step procedure to...Ch. 7.2 - 10. Indicate which of the following situations...Ch. 7.3 - 11. The following data are from a simple random...Ch. 7.3 - Prob. 8E Ch. 7.3 - Prob. 9E Ch. 7.3 - 14. Morningstar publishes ratings data on 1208...

Ch. 7.3 - 15. The National Football League (NFL) polls fans...Ch. 7.3 - AARP Survey. In a sample of 426 U.S. adults age 50...Ch. 7.3 - 17. One of the questions in the Pew Internet &...Ch. 7.3 - In this section we showed how a simple random...Ch. 7.5 - 19. A population has a mean of 200 and a standard...Ch. 7.5 - Prob. 16E Ch. 7.5 - 21. Suppose a random sample of size 50 is selected...Ch. 7.5 - Refer to the EAI sampling problem. Suppose a...Ch. 7.5 - In the EAI sampling problem (see Figure 7.8), we...Ch. 7.5 - 24. Barron’s reported that the average number of...Ch. 7.5 - The average full-sized front-loading Energy Star...Ch. 7.5 - Federal Income Tax Returns. The Wall Street...Ch. 7.5 - 27. The Economic Policy Institute periodically...Ch. 7.5 - State Rainfalls. The state of California has a...Ch. 7.5 - The mean preparation fee H&R Block charged retail...Ch. 7.5 - 30. To estimate the mean age for a population of...Ch. 7.6 - 31. A sample of size 100 is selected from a...Ch. 7.6 - 32. A population proportion is .40. A sample of...Ch. 7.6 - Prob. 29E Ch. 7.6 - 34. The population proportion is .30. What is the...Ch. 7.6 - Prob. 31E Ch. 7.6 - 36. The Wall Street Journal reported that the age...Ch. 7.6 - Seventy two percent of American adults have read a...Ch. 7.6 - Unnecessary Medical Care. According to Reader’s...Ch. 7.6 - Thirty-six percent of all Americans drink bottled...Ch. 7.6 - Prob. 36E Ch. 7.6 - 41. The Food Marketing Institute shows that 17% of...Ch. 7.8 - Martina Levitt, director of marketing for the...Ch. 7.8 - Consider the Spontanversation sampling problem for...Ch. 7.8 - The Wall Street Journal reported that 37% of all...Ch. 7.8 - The vice president of sales for Blasterman...Ch. 7 - Shadow Stocks. Jack Lawler, a financial analyst,...Ch. 7 - 43. The latest available data showed health...Ch. 7 - 44. Foot Locker uses sales per square foot as a...Ch. 7 - 45. Allegiant Airlines charges a mean base fare of...Ch. 7 - 46. After deducting grants based on need, the...Ch. 7 - Prob. 47SE Ch. 7 - Prob. 48SE Ch. 7 - Production Quality Control. A production process...Ch. 7 - Prob. 50SE Ch. 7 - Prob. 51SE Ch. 7 - Prob. 52SE Ch. 7 - Prob. 53SE Ch. 7 - 54. Lori Jeffrey is a successful sales...Ch. 7 - Managerial Report Prepare a managerial report that...

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Solution Summary: The author calculates that Lori obtained a book adoption for sales calls is 25% and the standard error of the proportion is 0.0625.

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