3rd Edition

ISBN: 9780135190210

Author: Gould

Publisher: PEARSON CO

Concept explainers

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 4, Problem 48SE

Distance and Train Ticket Price The following table gives the distance from Boston to each city and the cost of a train ticket from Boston to that city for a certain date.

Chapter 4, Problem 48SE, Distance and Train Ticket Price The following table gives the distance from Boston to each city and , example 1

Chapter 4, Problem 48SE, Distance and Train Ticket Price The following table gives the distance from Boston to each city and , example 2

a. Use technology to produce a scatterplot. Based on your scatterplot do you think there is a strong linear relationship between these two variables? Explain.

b. Compute r and write the equation of the regression line. Use the words “Ticket Price” and “Distance” in your equation. Round off to two decimal places.

c. Provide an interpretation of the slope of the regression line.

d. Provide an interpretation of the y-intercept of the regression line or explain why it would not be appropriate to do so.

e. Use the regression equation to predict the cost of a train ticket from Boston to Pittsburgh, a distance of 572 miles.

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Chapter 4, Problem 47SE

Chapter 4, Problem 49SE

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Chapter 4 Solutions

EP INTRODUCTORY STATISTICS-MYSTATLAB

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Solution Summary: The author explains how to draw and interpret a scatterplot using Minitab. The table provides the data on the distance from Boston to each city and the time of the train ticket.

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