Applied Statistics in Business and Economics

5th Edition

ISBN: 9780077837303

Author: David Doane, Lori Seward Senior Instructor of Operations Management

Publisher: McGraw-Hill Education

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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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Textbook Question

Chapter 12.3, Problem 15SE

Below are fitted regressions for Y = asking price of a used vehicle and X = the age of the vehicle. The observed range of X was 1 to 8 years. The sample consisted of all vehicles listed for sale in a particular week. (a) Interpret the slope of each fitted regression. (b) Interpret the intercept of each fitted regression. Does the intercept have meaning? (c) Predict the price of a 5-year-old Chevy Blazer. (d) Predict the price of a 5-year-old Chevy Silverado.

Chevy Blazer: Price = 16,189 − 1,050 Age (n = 21 vehicles, observed X range was 1 to 8 years).

Chevy Silverado: Price = 22,591 − 1,339 Age (n = 24 vehicles, observed X range was 1 to 10 years).

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Chapter 12.3, Problem 14SE

Chapter 12.3, Problem 16SE

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Chapter 12 Solutions

Applied Statistics in Business and Economics

Ch. 12.1 - Prob. 1SE Ch. 12.1 - Prob. 2SE Ch. 12.1 - Prob. 3SE Ch. 12.1 - Prob. 4SE Ch. 12.1 - Prob. 5SE Ch. 12.1 - Prob. 6SE Ch. 12.2 - (a) Interpret the slope of the fitted regression...Ch. 12.2 - (a) Interpret the slope of the fitted regression...Ch. 12.2 - Prob. 9SE Ch. 12.2 - (a) Interpret the slope of the fitted regression...

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Solution Summary: The author explains the slope of a least squares regression line and the intercept of each fitted regression.

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