EBK STATISTICS FOR BUSINESS & ECONOMICS
EBK STATISTICS FOR BUSINESS & ECONOMICS
12th Edition
ISBN: 9780100460461
Author: Anderson
Publisher: YUZU
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Concept explainers

Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as p…
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Chapter 3.5, Problem 60E

The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 Index (S&P 500) are both used to measure the performance of the stock market. The DJIA is based on the price of stocks for 30 large companies; the S&P 500 is based on the price of stocks for 500 companies. If both the DJIA and S&P 500 measure the performance of the stock market, how are they correlated? The following data show the daily percent increase or daily percent decrease in the DJIA and S&P 500 for a sample of nine days over a three-month period (The Wall Street Journal, January 15 to March 10, 2006).

DJIA .20 .82 −.99 .04 −.24 1.01 .30 .55 −.25
S&P500 .24 .19 −.91 .08 −.33 .87 .36 .83 −.16
  1. a. Show a scatter diagram.
  2. b. Compute the sample correlation coefficient for these data.
  3. c. Discuss the association between the DJIA and S&P 500. Do you need to check both before having a general idea about the daily stock market performance?
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Chapter 3 Solutions

EBK STATISTICS FOR BUSINESS & ECONOMICS

Ch. 3.1 - Consider a sample with data values of 10, 20, 12,...Ch. 3.1 - Consider a sample with data values of 10, 20, 21,...Ch. 3.1 - Consider the following data and corresponding...Ch. 3.1 - Consider the following data. Period Rate of Return...Ch. 3.1 - Consider a sample with data values of 27, 25, 20,...Ch. 3.1 - Consider a sample with data values of 53, 55, 70,...Ch. 3.1 - The average number of minutes Americans commute to...Ch. 3.1 - During the 2007-2008 NCAA college basketball...Ch. 3.1 - Endowment income is a critical part of the annual...Ch. 3.1 - The cost of consumer purchases such as...
Ch. 3.1 - According to the National Education Association...Ch. 3.1 - The Big Bang Theory, a situation comedy featuring...Ch. 3.1 - In automobile mileage and gasoline-consumption...Ch. 3.1 - The data contained in the file named StateUnemp...Ch. 3.1 - Martinez Auto Supplies has retail stores located...Ch. 3.1 - The grade point average for college students is...Ch. 3.1 - The following table shows the total return and the...Ch. 3.1 - Based on a survey of masters programs in business...Ch. 3.1 - Annual revenue for Corning Supplies grew by 5.5%...Ch. 3.1 - Suppose that at the beginning of 2004 you invested...Ch. 3.1 - If an asset declines in value from 5000 to 3500...Ch. 3.1 - The current value of a company is 25 million. If...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 27, 25, 20,...Ch. 3.2 - A bowlers scores for six games were 182, 168, 184,...Ch. 3.2 - The results of a search to find the least...Ch. 3.2 - The Australian Open is the first of the four grand...Ch. 3.2 - The Los Angeles times regularly reports the air...Ch. 3.2 - The following data were used to construct the...Ch. 3.2 - The results of Accounting Principals latest...Ch. 3.2 - Prob. 32ECh. 3.2 - Scores turned in by an amateur golfer at the...Ch. 3.2 - The following times were recorded by the...Ch. 3.3 - Consider a sample with data values of 10, 20, 12,...Ch. 3.3 - Consider a sample with a mean of 500 and a...Ch. 3.3 - Consider a sample with a mean of 30 and a standard...Ch. 3.3 - Suppose the data have a bell-shaped distribution...Ch. 3.3 - The results of a national survey showed that on...Ch. 3.3 - The energy information Administration reported...Ch. 3.3 - The national average for the math portion of the...Ch. 3.3 - Many families in California are using backyard...Ch. 3.3 - Florida Power Light (FPL) Company has enjoyed a...Ch. 3.3 - A sample of 10 NCAA college basketball game scores...Ch. 3.3 - The Associated Press Team Marketing Report listed...Ch. 3.4 - Consider a sample with data values of 27, 25, 20,...Ch. 3.4 - Prob. 47ECh. 3.4 - Prob. 48ECh. 3.4 - A data set has a first quartile of 42 and a third...Ch. 3.4 - Naples, Florida, hosts a half-marathon (13.1-mile...Ch. 3.4 - Annual sales, in millions of dollars, for 21...Ch. 3.4 - Consumer Reports provided overall customer...Ch. 3.4 - The Philadelphia Phillies defeated the Tampa Bay...Ch. 3.4 - A listing of 46 mutual funds and their 12-month...Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Ten major college football bowl games were played...Ch. 3.5 - A department of transportations study on driving...Ch. 3.5 - At the beginning of 2009, the economic downturn...Ch. 3.5 - The Dow Jones Industrial Average (DJIA) and the...Ch. 3.5 - Prob. 61ECh. 3 - The average number of times Americans dine out in...Ch. 3 - The U.S. Census Bureau provides statistics on...Ch. 3 - The average waiting time for a patient at an El...Ch. 3 - The U.S. Department of Education reports that...Ch. 3 - Small business owners often look to payroll...Ch. 3 - Public transportation and the automobile are two...Ch. 3 - The National Association of Realtors reported the...Ch. 3 - Prob. 69SECh. 3 - Travel + Leisure magazine provides an annual list...Ch. 3 - Morningstar tracks the performance of a large...Ch. 3 - Does a major league baseball teams record during...Ch. 3 - The days to maturity for a sample of five money...Ch. 3 - Automobiles traveling on a road with a posted...Ch. 3 - The Panama Railroad Company was established in...Ch. 3 - Pelican Stores Pelican Stores, a division of...Ch. 3 - Motion Picture Industry The motion picture...Ch. 3 - Business Schools of Asia-Pacific The pursuit of a...Ch. 3 - Heavenly Chocolates Website Transactions Heavenly...Ch. 3 - African Elephant Populations Although millions of...
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