Question 1

If there is a strong negative linear relationship between the variables, the value of __________ will be close to -1.

Accepted Answer

r (correla

Question 2

A correlation coefficient r was calculated to be 0.610. The coefficient of determination would be approximately __________.

Accepted Answer

The answer of A correlation coefficient r was calculated to...

Question 3

In a __________ relationship, as one variable increases, the other variable decreases, and vice versa.

Accepted Answer

The answer of In a __________ relationship, as one variable...

Question 4

If the correlation coefficient r is equal to 0.394, find the coefficient of nondetermination.

Accepted Answer

A)  0.845 
B)  0.628 
C)  0.275 
D)  0.155 
A)  0.845 
B)  0.628 
C)  0.275 
D)  0.155

Question 5

Regression is a statistical method used to describe the nature of the relationship between variables.

Accepted Answer

A) True 
 B)False

Question 6

A formula for the correlation coefficient r is __________.

Accepted Answer

The answer of A formula for the correlation coefficient r...

Question 7

For a prediction value of y' from a specific value x, which of the following contribute to the prediction error?

Accepted Answer

A)  The error in estimating the slope 
B)  The error in estimating the intercept 
C)  The standard error of the estimate 
D)  All of the above 
A)  The error in estimating the slope 
B)  The error in estimating the intercept 
C)  The standard error of the estimate 
D)  All of the above

Question 8

The rounding rule for the correlation coefficient requires two decimal places.

Accepted Answer

A) True 
 B)False

Question 9

The equation of a regression line is   . What is the intercept of this line?

Accepted Answer

A)  -4.6 
B)  3.2 
C)  4.6 
D)  0 
A)  -4.6 
B)  3.2 
C)  4.6 
D)  0

Question 10

Compute the standard error of the estimate for the data below. Round to the thousandths place.

Accepted Answer

A)  0.932 
B)  1.404 
C)  0.880 
D)  0.444 
A)  0.932 
B)  1.404 
C)  0.880 
D)  0.444

Question 11

A realtor wanted to determine if there was a relationship between the size (in 100 square feet) of a new custom-built home and the price (in thousands of dollars) of the home.
a. Draw a scatter plot.
b. Determine the regression line equation and plot the regression line
on the scatter plot.

Accepted Answer

The answer of A realtor wanted to determine if there...

Question 12

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in the figure below. What type of relationship exists between the flow rate and the change in temperature?

Accepted Answer

A)  negative 
B)  positive 
C)  There is no relationship. 
D)  curvilinear 
A)  negative 
B)  positive 
C)  There is no relationship. 
D)  curvilinear

Question 13

Using a regression line of   , a value of x = 3.6 would result in a predicted value of   .

Accepted Answer

A) True 
 B)False

Question 14

Determine the type of relationship shown in the figure below.

Accepted Answer

A)  positive 
B)  negative 
C)  multiple 
D)  There is no relationship. 
A)  positive 
B)  negative 
C)  multiple 
D)  There is no relationship.

Question 15

A correlation coefficient of 0.961 would mean that the values of x increase as the values of y decrease.

Accepted Answer

A) True 
 B)False

Question 16

As a researcher collects more and more data, the 95% prediction intervals in general

Accepted Answer

A)  become narrower and narrower, with the widths getting closer and closer to 0. 
B)  become narrower and narrower, but the widths are always more than approximately 2 times the standard error of the estimate. 
C)  become narrower and narrower, but the widths are always more than approximately 4 times the standard error of the estimate. 
D)  become narrower and narrower, but the widths are always more than approximately 4 times the slope. 
A)  become narrower and narrower, with the widths getting closer and closer to 0. 
B)  become narrower and narrower, but the widths are always more than approximately 2 times the standard error of the estimate. 
C)  become narrower and narrower, but the widths are always more than approximately 4 times the standard error of the estimate. 
D)  become narrower and narrower, but the widths are always more than approximately 4 times the slope.

Question 17

The population correlation coefficient is computed by using all possible pairs of data values   taken from a population.

Accepted Answer

A) True 
 B)False

Question 18

The standard error of estimate is the square root of the unexplained variation.

Accepted Answer

A) True 
 B)False

Question 19

A study was conducted to determine if there was a linear relationship between a person's age and his/her peak heart rate.
a. Draw the scatter plot for the variables.
b. Give a brief explanation of the type of relationship.

Accepted Answer

a. @#IMG-DLM& b. There appears

Question 20

A study was conducted to determine if there was a relationship between the prices a non-member of a book club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below. Compute the value of the correlation coefficient.

Accepted Answer

A)  0.762 
B)  0.857 
C)  0.679 
D)  0.932 
A)  0.762 
B)  0.857 
C)  0.679 
D)  0.932

If there is a strong negative linear relationship between the variables, the value of __________ will be close to -1.

A correlation coefficient r was calculated to be 0.610. The coefficient of determination would be approximately __________.

In a __________ relationship, as one variable increases, the other variable decreases, and vice versa.

If the correlation coefficient r is equal to 0.394, find the coefficient of nondetermination.

Regression is a statistical method used to describe the nature of the relationship between variables.

A formula for the correlation coefficient r is __________.

For a prediction value of y' from a specific value x, which of the following contribute to the prediction error?

The rounding rule for the correlation coefficient requires two decimal places.

The equation of a regression line is . What is the intercept of this line?

Compute the standard error of the estimate for the data below. Round to the thousandths place.

A realtor wanted to determine if there was a relationship between the size (in 100 square feet) of a new custom-built home and the price (in thousands of dollars) of the home. a. Draw a scatter plot. b. Determine the regression line equation and plot the regression line on the scatter plot.

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in the figure below. What type of relationship exists between the flow rate and the change in temperature?

Using a regression line of , a value of x = 3.6 would result in a predicted value of .

Determine the type of relationship shown in the figure below.

A correlation coefficient of 0.961 would mean that the values of x increase as the values of y decrease.

As a researcher collects more and more data, the 95% prediction intervals in general

The population correlation coefficient is computed by using all possible pairs of data values taken from a population.

The standard error of estimate is the square root of the unexplained variation.

A study was conducted to determine if there was a linear relationship between a person's age and his/her peak heart rate. a. Draw the scatter plot for the variables. b. Give a brief explanation of the type of relationship.

A study was conducted to determine if there was a relationship between the prices a non-member of a book club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below. Compute the value of the correlation coefficient.

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Data Description

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters

Exam 10: Correlation and Regression

If there is a strong negative linear relationship between the variables, the value of __________ will be close to -1.

A correlation coefficient r was calculated to be 0.610. The coefficient of determination would be approximately __________.

In a __________ relationship, as one variable increases, the other variable decreases, and vice versa.

If the correlation coefficient r is equal to 0.394, find the coefficient of nondetermination.

Regression is a statistical method used to describe the nature of the relationship between variables.

A formula for the correlation coefficient r is __________.

For a prediction value of y' from a specific value x, which of the following contribute to the prediction error?

The rounding rule for the correlation coefficient requires two decimal places.

The equation of a regression line is . What is the intercept of this line?

Compute the standard error of the estimate for the data below. Round to the thousandths place.

A realtor wanted to determine if there was a relationship between the size (in 100 square feet) of a new custom-built home and the price (in thousands of dollars) of the home. a. Draw a scatter plot. b. Determine the regression line equation and plot the regression line on the scatter plot.

Daniel Wiseman, a scientist for Gres-Trans Corp., wants to determine if the flow rate of a particular material changes with different changes in temperature. The data is plotted in the figure below. What type of relationship exists between the flow rate and the change in temperature?

Using a regression line of , a value of x = 3.6 would result in a predicted value of .

Determine the type of relationship shown in the figure below.

A correlation coefficient of 0.961 would mean that the values of x increase as the values of y decrease.

As a researcher collects more and more data, the 95% prediction intervals in general

The population correlation coefficient is computed by using all possible pairs of data values taken from a population.

The standard error of estimate is the square root of the unexplained variation.

A study was conducted to determine if there was a linear relationship between a person's age and his/her peak heart rate. a. Draw the scatter plot for the variables. b. Give a brief explanation of the type of relationship.

A study was conducted to determine if there was a relationship between the prices a non-member of a book club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below. Compute the value of the correlation coefficient.

The Nature of Probability and Statistics

Frequency Distributions and Graphs

Data Description

Probability and Counting Rules

Discrete Probability Distributions

The Normal Distribution

Confidence Intervals and Sample Size

Hypothesis Testing

Testing the Difference Between Two Means, Two Variances, and Two Proportions

Other Chi-Square Tests

Analysis of Variance

Nonparametric Statistics

Sampling and Simulation

Filters