Algebra and Trigonometry: Structure and Method, Book 2
Algebra and Trigonometry: Structure and Method, Book 2
2000th Edition
ISBN: 9780395977255
Author: MCDOUGAL LITTEL
Publisher: McDougal Littell
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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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Question
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Chapter 15.4, Problem 1OE

a.

To determine

To fill: The blank in the statement “When two variables have a high          correlation, one variable increases as the other variable increases.”

a.

Expert Solution
Check Mark

Answer to Problem 1OE

The complete statement is “When two variables have a high positive correlation, one variable increases as the other variable increases.”

Explanation of Solution

Given information:

The statement “When two variables have a high          correlation, one variable increases as the other variable increases.”

Consider the provided statement “When two variables have a high          correlation, one variable increases as the other variable increases.”

When the relationship between two data sets is to be analyzed scatter plot is used.

Provided two data sets outside temperature and heating bill. Now these two data sets are related as when outside temperature is low use of electrical appliances like air conditioners and fans are not used whereas when temperature is high use of such appliances increases and so the heating bill also amounts more.

For example: let x denote the outside temperature and y denote heating bill.

  x131823283338y51263090093012001500

The scatter plot of the data is provided below,

  Algebra and Trigonometry: Structure and Method, Book 2, Chapter 15.4, Problem 1OE , additional homework tip 1

It is observed that there is a positive relationship between x and y .

Therefore, the scatter plot between outside temperature and heating bill show a positive relationship.

Thus, the complete statement is “When two variables have a high positive correlation, one variable increases as the other variable increases.”

b.

To determine

To fill: The blank in the statement “When two variables have a high          correlation, one variable decreases as the other variable increases.”

b.

Expert Solution
Check Mark

Answer to Problem 1OE

The complete statement is “When two variables have a high negative correlation, one variable decreases as the other variable increases.”

Explanation of Solution

Given information:

The statement “When two variables have a high          correlation, one variable decreases as the other variable increases.”

Consider the provided statement “When two variables have a high          correlation, one variable decreases as the other variable increases.”

When the relationship between two data sets is to be analyzed scatter plot is used.

Consider the ordered pairs that are provided below,

  xy312.1510.187.195.1

Plot the ordered pairs on the Cartesian plane.

  Algebra and Trigonometry: Structure and Method, Book 2, Chapter 15.4, Problem 1OE , additional homework tip 2

It is observed that as the value of x increases the value of y decreases. Points seems to be collinear.

Therefore, there is a high negative correlation between x and y .

Thus, the complete statement is “When two variables have a high negative correlation, one variable decreases as the other variable increases.”

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Chapter 15.3, Problem 6MRE
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Chapter 15.4, Problem 2OE

Chapter 15 Solutions

Algebra and Trigonometry: Structure and Method, Book 2

Ch. 15.1 - Prob. 1OECh. 15.1 - Prob. 2OECh. 15.1 - Prob. 3OECh. 15.1 - Prob. 4OECh. 15.1 - Prob. 5OECh. 15.1 - Prob. 6OECh. 15.1 - Prob. 7OECh. 15.1 - Prob. 8OECh. 15.1 - Prob. 1WECh. 15.1 - Prob. 2WE
Ch. 15.1 - Prob. 3WECh. 15.1 - Prob. 4WECh. 15.1 - Prob. 5WECh. 15.1 - Prob. 6WECh. 15.1 - Prob. 7WECh. 15.1 - Prob. 8WECh. 15.1 - Prob. 9WECh. 15.1 - Prob. 10WECh. 15.1 - Prob. 11WECh. 15.1 - Prob. 12WECh. 15.1 - Prob. 13WECh. 15.1 - Prob. 14WECh. 15.1 - Prob. 15WECh. 15.1 - Prob. 16WECh. 15.1 - Prob. 17WECh. 15.1 - Prob. 18WECh. 15.1 - Prob. 1MRECh. 15.1 - Prob. 2MRECh. 15.1 - Prob. 3MRECh. 15.1 - Prob. 4MRECh. 15.1 - Prob. 5MRECh. 15.1 - Prob. 6MRECh. 15.2 - Prob. 1OECh. 15.2 - Prob. 2OECh. 15.2 - Prob. 3OECh. 15.2 - Prob. 4OECh. 15.2 - Prob. 5OECh. 15.2 - Prob. 6OECh. 15.2 - Prob. 7OECh. 15.2 - Prob. 8OECh. 15.2 - Prob. 9OECh. 15.2 - Prob. 10OECh. 15.2 - Prob. 11OECh. 15.2 - Prob. 12OECh. 15.2 - Prob. 13OECh. 15.2 - Prob. 14OECh. 15.2 - Prob. 1WECh. 15.2 - Prob. 2WECh. 15.2 - Prob. 3WECh. 15.2 - Prob. 4WECh. 15.2 - Prob. 5WECh. 15.2 - Prob. 6WECh. 15.2 - Prob. 7WECh. 15.2 - Prob. 8WECh. 15.2 - Prob. 9WECh. 15.2 - Prob. 10WECh. 15.2 - Prob. 11WECh. 15.2 - Prob. 12WECh. 15.2 - Prob. 13WECh. 15.2 - Prob. 14WECh. 15.2 - Prob. 15WECh. 15.2 - Prob. 16WECh. 15.2 - Prob. 17WECh. 15.2 - Prob. 18WECh. 15.2 - Prob. 19WECh. 15.2 - Prob. 20WECh. 15.3 - Prob. 1OECh. 15.3 - Prob. 2OECh. 15.3 - Prob. 3OECh. 15.3 - Prob. 4OECh. 15.3 - Prob. 5OECh. 15.3 - Prob. 6OECh. 15.3 - Prob. 1WECh. 15.3 - Prob. 2WECh. 15.3 - Prob. 3WECh. 15.3 - Prob. 4WECh. 15.3 - Prob. 5WECh. 15.3 - Prob. 6WECh. 15.3 - Prob. 7WECh. 15.3 - Prob. 8WECh. 15.3 - Prob. 9WECh. 15.3 - Prob. 10WECh. 15.3 - Prob. 11WECh. 15.3 - Prob. 12WECh. 15.3 - Prob. 1MRECh. 15.3 - Prob. 2MRECh. 15.3 - Prob. 3MRECh. 15.3 - Prob. 4MRECh. 15.3 - Prob. 5MRECh. 15.3 - Prob. 6MRECh. 15.4 - Prob. 1OECh. 15.4 - Prob. 2OECh. 15.4 - Prob. 3OECh. 15.4 - Prob. 1WECh. 15.4 - Prob. 2WECh. 15.4 - Prob. 3WECh. 15.4 - Prob. 4WECh. 15.4 - Prob. 5WECh. 15.4 - Prob. 6WECh. 15.4 - Prob. 7WECh. 15.4 - Prob. 8WECh. 15.4 - Prob. 9WECh. 15.4 - Prob. 10WECh. 15.4 - Prob. 11WECh. 15.4 - Prob. 12WECh. 15.4 - Prob. 13WECh. 15.4 - Prob. 1STCh. 15.4 - Prob. 2STCh. 15.4 - Prob. 3STCh. 15.4 - Prob. 4STCh. 15.4 - Prob. 5STCh. 15.4 - Prob. 6STCh. 15.5 - Prob. 1OECh. 15.5 - Prob. 2OECh. 15.5 - Prob. 3OECh. 15.5 - Prob. 4OECh. 15.5 - Prob. 1WECh. 15.5 - Prob. 2WECh. 15.5 - Prob. 3WECh. 15.5 - Prob. 4WECh. 15.5 - Prob. 5WECh. 15.5 - Prob. 6WECh. 15.5 - Prob. 7WECh. 15.5 - Prob. 8WECh. 15.5 - Prob. 9WECh. 15.5 - Prob. 10WECh. 15.5 - Prob. 11WECh. 15.5 - Prob. 12WECh. 15.5 - Prob. 13WECh. 15.5 - Prob. 14WECh. 15.5 - Prob. 15WECh. 15.5 - Prob. 16WECh. 15.5 - Prob. 17WECh. 15.5 - Prob. 18WECh. 15.5 - Prob. 19WECh. 15.5 - Prob. 20WECh. 15.5 - Prob. 1MRECh. 15.5 - Prob. 2MRECh. 15.5 - Prob. 3MRECh. 15.5 - Prob. 4MRECh. 15.5 - Prob. 5MRECh. 15.5 - Prob. 6MRECh. 15.5 - Prob. 7MRECh. 15.5 - Prob. 8MRECh. 15.6 - Prob. 1OECh. 15.6 - Prob. 2OECh. 15.6 - Prob. 3OECh. 15.6 - Prob. 4OECh. 15.6 - Prob. 5OECh. 15.6 - Prob. 6OECh. 15.6 - Prob. 7OECh. 15.6 - Prob. 8OECh. 15.6 - Prob. 9OECh. 15.6 - Prob. 10OECh. 15.6 - Prob. 11OECh. 15.6 - Prob. 12OECh. 15.6 - Prob. 1WECh. 15.6 - Prob. 2WECh. 15.6 - Prob. 3WECh. 15.6 - Prob. 4WECh. 15.6 - Prob. 5WECh. 15.6 - Prob. 6WECh. 15.6 - Prob. 7WECh. 15.6 - Prob. 8WECh. 15.6 - Prob. 9WECh. 15.6 - Prob. 10WECh. 15.6 - Prob. 11WECh. 15.6 - Prob. 12WECh. 15.6 - Prob. 13WECh. 15.6 - Prob. 14WECh. 15.6 - Prob. 15WECh. 15.6 - Prob. 16WECh. 15.6 - Prob. 17WECh. 15.6 - Prob. 18WECh. 15.6 - Prob. 19WECh. 15.6 - Prob. 20WECh. 15.6 - Prob. 21WECh. 15.6 - Prob. 22WECh. 15.6 - Prob. 23WECh. 15.6 - Prob. 24WECh. 15.6 - Prob. 25WECh. 15.6 - Prob. 26WECh. 15.6 - Prob. 27WECh. 15.6 - Prob. 28WECh. 15.6 - Prob. 29WECh. 15.6 - Prob. 30WECh. 15.6 - Prob. 31WECh. 15.7 - Prob. 1OECh. 15.7 - Prob. 2OECh. 15.7 - Prob. 3OECh. 15.7 - Prob. 4OECh. 15.7 - Prob. 5OECh. 15.7 - Prob. 6OECh. 15.7 - Prob. 7OECh. 15.7 - Prob. 1WECh. 15.7 - Prob. 2WECh. 15.7 - Prob. 3WECh. 15.7 - Prob. 4WECh. 15.7 - Prob. 5WECh. 15.7 - Prob. 6WECh. 15.7 - Prob. 7WECh. 15.7 - Prob. 8WECh. 15.7 - Prob. 9WECh. 15.7 - Prob. 10WECh. 15.7 - Prob. 11WECh. 15.7 - Prob. 12WECh. 15.7 - Prob. 13WECh. 15.7 - Prob. 14WECh. 15.7 - Prob. 15WECh. 15.7 - Prob. 16WECh. 15.7 - Prob. 17WECh. 15.7 - Prob. 18WECh. 15.7 - Prob. 19WECh. 15.7 - Prob. 20WECh. 15.7 - Prob. 21WECh. 15.7 - Prob. 22WECh. 15.7 - Prob. 23WECh. 15.7 - Prob. 24WECh. 15.7 - Prob. 25WECh. 15.7 - Prob. 26WECh. 15.7 - Prob. 27WECh. 15.7 - Prob. 28WECh. 15.7 - Prob. 29WECh. 15.7 - Prob. 30WECh. 15.7 - Prob. 1MRECh. 15.7 - Prob. 2MRECh. 15.7 - Prob. 3MRECh. 15.7 - Prob. 4MRECh. 15.7 - Prob. 5MRECh. 15.7 - Prob. 6MRECh. 15.7 - Prob. 7MRECh. 15.7 - Prob. 8MRECh. 15.7 - Prob. 9MRECh. 15.7 - Prob. 10MRECh. 15.7 - Prob. 11MRECh. 15.7 - Prob. 12MRECh. 15.7 - Prob. 1CECh. 15.7 - Prob. 2CECh. 15.7 - Prob. 3CECh. 15.7 - Prob. 4CECh. 15.7 - Prob. 5CECh. 15.7 - Prob. 1STCh. 15.7 - Prob. 2STCh. 15.7 - Prob. 3STCh. 15.7 - Prob. 4STCh. 15.7 - Prob. 5STCh. 15.7 - Prob. 6STCh. 15.8 - Prob. 1OECh. 15.8 - Prob. 2OECh. 15.8 - Prob. 1WECh. 15.8 - Prob. 2WECh. 15.8 - Prob. 3WECh. 15.8 - Prob. 4WECh. 15.8 - Prob. 5WECh. 15.8 - Prob. 6WECh. 15.8 - Prob. 7WECh. 15.8 - Prob. 8WECh. 15.8 - Prob. 9WECh. 15.8 - Prob. 10WECh. 15.8 - Prob. 11WECh. 15.8 - Prob. 12WECh. 15.8 - Prob. 13WECh. 15.8 - Prob. 14WECh. 15.8 - Prob. 15WECh. 15.8 - Prob. 16WECh. 15.9 - Prob. 1OECh. 15.9 - Prob. 2OECh. 15.9 - Prob. 3OECh. 15.9 - Prob. 4OECh. 15.9 - Prob. 5OECh. 15.9 - Prob. 6OECh. 15.9 - Prob. 7OECh. 15.9 - Prob. 8OECh. 15.9 - Prob. 9OECh. 15.9 - Prob. 10OECh. 15.9 - Prob. 11OECh. 15.9 - Prob. 1WECh. 15.9 - Prob. 2WECh. 15.9 - Prob. 3WECh. 15.9 - Prob. 4WECh. 15.9 - Prob. 5WECh. 15.9 - Prob. 6WECh. 15.9 - Prob. 7WECh. 15.9 - Prob. 8WECh. 15.9 - Prob. 9WECh. 15.9 - Prob. 10WECh. 15.9 - Prob. 11WECh. 15.9 - Prob. 12WECh. 15.9 - Prob. 13WECh. 15.9 - Prob. 14WECh. 15.9 - Prob. 1MRECh. 15.9 - Prob. 2MRECh. 15.9 - Prob. 3MRECh. 15.9 - Prob. 4MRECh. 15.9 - Prob. 5MRECh. 15.9 - Prob. 6MRECh. 15.9 - Prob. 7MRECh. 15.9 - Prob. 8MRECh. 15.9 - Prob. 1CECh. 15.9 - Prob. 2CECh. 15.9 - Prob. 3CECh. 15.9 - Prob. 4CECh. 15.9 - Prob. 5CECh. 15.9 - Prob. 6CECh. 15.9 - Prob. 1.1ECh. 15.9 - Prob. 1.2ECh. 15.9 - Prob. 1.3ECh. 15.9 - Prob. 1.4ECh. 15.9 - Prob. 1.5ECh. 15.9 - Prob. 1.6ECh. 15.9 - Prob. 2.1ECh. 15.9 - Prob. 2.2ECh. 15.9 - Prob. 2.3ECh. 15.9 - Prob. 2.4ECh. 15.9 - Prob. 2.5ECh. 15.9 - Prob. 2.6ECh. 15.9 - Prob. 2.7ECh. 15.9 - Prob. 2.8ECh. 15.10 - Prob. 1OECh. 15.10 - Prob. 2OECh. 15.10 - Prob. 3OECh. 15.10 - Prob. 4OECh. 15.10 - Prob. 5OECh. 15.10 - Prob. 1WECh. 15.10 - Prob. 2WECh. 15.10 - Prob. 3WECh. 15.10 - Prob. 4WECh. 15.10 - Prob. 5WECh. 15.10 - Prob. 6WECh. 15.10 - Prob. 7WECh. 15.10 - Prob. 8WECh. 15.10 - Prob. 9WECh. 15.10 - Prob. 10WECh. 15.10 - Prob. 11WECh. 15.10 - Prob. 12WECh. 15.10 - Prob. 13WECh. 15.10 - Prob. 14WECh. 15.10 - Prob. 15WECh. 15.10 - Prob. 16WECh. 15.10 - Prob. 17WECh. 15.10 - Prob. 1STCh. 15.10 - Prob. 2STCh. 15.10 - Prob. 3STCh. 15.10 - Prob. 1ECh. 15.10 - Prob. 2ECh. 15 - Prob. 1CRCh. 15 - Prob. 2CRCh. 15 - Prob. 3CRCh. 15 - Prob. 4CRCh. 15 - Prob. 5CRCh. 15 - Prob. 6CRCh. 15 - Prob. 7CRCh. 15 - Prob. 8CRCh. 15 - Prob. 9CRCh. 15 - Prob. 10CRCh. 15 - Prob. 11CRCh. 15 - Prob. 12CRCh. 15 - Prob. 1CTCh. 15 - Prob. 2CTCh. 15 - Prob. 3CTCh. 15 - Prob. 4CTCh. 15 - Prob. 5CTCh. 15 - Prob. 6CTCh. 15 - Prob. 7CTCh. 15 - Prob. 8CTCh. 15 - Prob. 9CTCh. 15 - Prob. 10CTCh. 15 - Prob. 11CT

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