Student Solutions Manual for Basic Business Statistics

13th Edition

ISBN: 9780321926708

Author: David M. Levine; Mark L. Berenson; Timothy C. Krehbiel; Kathryn A. Szabat; David F. Stephan

Publisher: Pearson Education

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Textbook Question

Chapter 8, Problem 54PS

The Pew Internet Project survey of 2,253 American adults (data extracted from pewinternet.org/Commentary/2012/February/Pew-Internet-mobile) found the following:

1,983 have a cellphone

1,307 have a desktop computer

1,374 have a laptop computer

406 have an ebook reader

406 have a tablet computer

a. Construct 95 % conï¬�dence interval estimates for the population proportion of the electronic devices adults own.

b. What conclusions can you reach concerning what electronic devices adults have?

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 8, Problem 53PS

Chapter 8, Problem 55PS

Chapter 8 Solutions

Student Solutions Manual for Basic Business Statistics

Ch. 8 - If X=85, =8,andn=64, construct a 95 confidence...Ch. 8 - If X=125,=24,andn=36, construct a 99 confidence...Ch. 8 - Why is it not possible in Example 8.1 on page 280...Ch. 8 - Is it true in Example 8.1 on page 277 that you do...Ch. 8 - A market researcher selects a simple random sample...Ch. 8 - Suppose that you are going to collect a set of...Ch. 8 - Consider the confidence interval estimate...Ch. 8 - You are working as an assistant to the dean of...Ch. 8 - A bottled water distributor wants to estimate the...Ch. 8 - The operations manager at a compact fluorescent...

Ch. 8 - If X=75,S=24,andn=36, and assuming that the...Ch. 8 - Determine the critical value of t in each of the...Ch. 8 - Assuming that the populations is normally...Ch. 8 - Assuming that the population is normally...Ch. 8 - A marketing researcher wants to estimate the mean...Ch. 8 - A survey of nonproï¬�t organizations showed that...Ch. 8 - The U.S. Department of Transportation requires...Ch. 8 - Prob. 18PS Ch. 8 - The ï¬�le Sedans contains the overall miles per...Ch. 8 - The file SUV contains the overall MPG of 2013...Ch. 8 - Is there a difference in the yields of different...Ch. 8 - One of the major measures of the quality of...Ch. 8 - A manufacturing company produces electric...Ch. 8 - Prob. 24PS Ch. 8 - One operation of a mill is cut pieces of steel...Ch. 8 - Ifn=200andX=50, Construct a 95 confidence interval...Ch. 8 - ifn=400andX=25, Construct a 99 confidence interval...Ch. 8 - A cellphone provider has the business objective of...Ch. 8 - In a survey of 3,773 travelers, 1,509 said that...Ch. 8 - Prob. 30PS Ch. 8 - Prob. 31PS Ch. 8 - Prob. 32PS Ch. 8 - What are the factors that inï¬‚uence technology...Ch. 8 - If you want to be 95 confident of estimating the...Ch. 8 - If you want to be 99 confident of estimating of...Ch. 8 - If you want to be 99 confident of estimating the...Ch. 8 - If you want to be 95 confident of estimating the...Ch. 8 - A survey is planned to determine the mean annual...Ch. 8 - If the manager of a bottled water distributor...Ch. 8 - Prob. 40PS Ch. 8 - If the inspection division of a county weights and...Ch. 8 - Prob. 42PS Ch. 8 - Prob. 43PS Ch. 8 - A growing niche in the restaurant business is...Ch. 8 - What advertising medium is most inï¬‚uential in...Ch. 8 - A survey of 300 U.S. online shoppers was...Ch. 8 - Prob. 47PS Ch. 8 - According to a new study released by Infosys. a...Ch. 8 - Prob. 49PS Ch. 8 - Why can you never really have 100 confidence of...Ch. 8 - When should you use the t distribution to develop...Ch. 8 - Why is it true that for a given sample size, n an...Ch. 8 - Why is the sample size needed to determine the...Ch. 8 - The Pew Internet Project survey of 2,253 American...Ch. 8 - Prob. 55PS Ch. 8 - A market researcher for a consumer electronics...Ch. 8 - Prob. 57PS Ch. 8 - Prob. 58PS Ch. 8 - A national association devoted to human resource...Ch. 8 - The financial impact of IT system downtime is a...Ch. 8 - The branch manager of an outlet (Store 1) of a...Ch. 8 - Scarlett and Heather, the owners of an upscale...Ch. 8 - The manufacturer of Ice Melt claims that its...Ch. 8 - Claims fraud (illegitimate claims) and buildup...Ch. 8 - A quality characteristic of interest for a...Ch. 8 - Prob. 66PS Ch. 8 - The manufacturer of Boston and Vermont asphalt...Ch. 8 - The manufacturer of Boston and Vermont asphalt...Ch. 8 - Referring to the results in Problem 8.66...

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Solution Summary: The author explains how to calculate the 95% confidence interval estimates for the population proportion of American adults who own a cellphone.

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Chapter 8 Solutions