Question 1

The size of the sample is ______.

Accepted Answer

A) 24 
B) 23 
C) 22 
D) 21 
A) 24 
B) 23 
C) 22 
D) 21 B

Question 2

An assumption of regression analysis is homoscedasticity, which states that the

Accepted Answer

A) residuals exhibit no patterns across values for the independent variable. 
B) residuals exhibit no patterns across values for the dependent variable. 
C) variation of the dependent variable is the same across all values for the independent variable. 
D) relationship between the independent and dependent variables is linear. 
A) residuals exhibit no patterns across values for the independent variable. 
B) residuals exhibit no patterns across values for the dependent variable. 
C) variation of the dependent variable is the same across all values for the independent variable. 
D) relationship between the independent and dependent variables is linear. C

Question 3

A 95% confidence interval will always be wider than a 95% prediction interval using the same value of x.

Accepted Answer

A) True 
 B)False  False

Question 4

If two variables have a correlation coefficient equal to - 0.60 from a sample size of 5, we can conclude that the population correlation coefficient is less than zero using α = 0.05.

Accepted Answer

A) True 
 B)False

Question 5

An assumption of a regression analysis is that the residuals exhibit no patterns across values for the dependent variable.

Accepted Answer

A) True 
 B)False

Question 6

The correlation coefficient is a measure of the slope of the scatter plot for the independent and dependent variables.

Accepted Answer

A) True 
 B)False

Question 7

The size of the sample is ______.

Accepted Answer

A) 8 
B) 6 
C) 5 
D) 7 
A) 8 
B) 6 
C) 5 
D) 7

Question 8

A correlation analysis requires that the data be either ______ data or ______ data.

Accepted Answer

A) interval, ratio 
B) nominal, ratio 
C) ordinal, interval 
D) nominal, interval 
A) interval, ratio 
B) nominal, ratio 
C) ordinal, interval 
D) nominal, interval

Question 9

The total sum of squares can never be negative.

Accepted Answer

A) True 
 B)False

Question 10

The least squares method is a mathematical procedure used to identify the linear equation that best fits a set of ordered pairs.

Accepted Answer

A) True 
 B)False

Question 11

The values of the correlation coefficient range between - 1.0 and +1.0.

Accepted Answer

A) True 
 B)False

Question 12

The difference between the actual data value and the dependent variable is known as the residual.

Accepted Answer

A) True 
 B)False

Question 13

If the slope of the simple regression equation is equal to zero, the scatter plot for the ordered pairs will be a vertical straight line indicating that there is no relationship between the independent and dependent variables.

Accepted Answer

A) True 
 B)False

Question 14

The percentage of the variation in hours of sleep per night that is explained by the age of the adult is _____.

Accepted Answer

A) 39.07 
B) 15.27 
C) 23.60 
D) 11.23 
A) 39.07 
B) 15.27 
C) 23.60 
D) 11.23

Question 15

The ________ measures the variation in the dependent variable that is explained by variables other than the independent variable in simple regression analysis.

Accepted Answer

A) sum of squares within 
B) sum of squares regression 
C) sum of squares error 
D) total sum of squares 
A) sum of squares within 
B) sum of squares regression 
C) sum of squares error 
D) total sum of squares

Question 16

Using the regression equation to predict values for the dependent variable beyond the range of the data may provide results that are unreliable.

Accepted Answer

A) True 
 B)False

Question 17

The size of the sample is _____.

Accepted Answer

A) 10 
B) 13 
C) 12 
D) 14 
A) 10 
B) 13 
C) 12 
D) 14

Question 18

A relationship is linear if the scatter plot of the independent and dependent variables has a straight- line pattern.

Accepted Answer

A) True 
 B)False

Question 19

When the p- value for testing the significance of the regression slope is less than alpha, we conclude that there is a significant relationship between the dependent and independent variables.

Accepted Answer

A) True 
 B)False

Question 20

If two variables have a correlation coefficient equal to +0.75, the scatter plot will have an upward slope moving from left to right.

Accepted Answer

A) True 
 B)False

The size of the sample is ______.

An assumption of regression analysis is homoscedasticity, which states that the

A 95% confidence interval will always be wider than a 95% prediction interval using the same value of x.

If two variables have a correlation coefficient equal to - 0.60 from a sample size of 5, we can conclude that the population correlation coefficient is less than zero using α = 0.05.

An assumption of a regression analysis is that the residuals exhibit no patterns across values for the dependent variable.

The correlation coefficient is a measure of the slope of the scatter plot for the independent and dependent variables.

The size of the sample is ______.

A correlation analysis requires that the data be either data or data.

The total sum of squares can never be negative.

The least squares method is a mathematical procedure used to identify the linear equation that best fits a set of ordered pairs.

The values of the correlation coefficient range between - 1.0 and +1.0.

The difference between the actual data value and the dependent variable is known as the residual.

If the slope of the simple regression equation is equal to zero, the scatter plot for the ordered pairs will be a vertical straight line indicating that there is no relationship between the independent and dependent variables.

The percentage of the variation in hours of sleep per night that is explained by the age of the adult is _____.

The ________ measures the variation in the dependent variable that is explained by variables other than the independent variable in simple regression analysis.

Using the regression equation to predict values for the dependent variable beyond the range of the data may provide results that are unreliable.

The size of the sample is _____.

A relationship is linear if the scatter plot of the independent and dependent variables has a straight- line pattern.

When the p- value for testing the significance of the regression slope is less than alpha, we conclude that there is a significant relationship between the dependent and independent variables.

If two variables have a correlation coefficient equal to +0.75, the scatter plot will have an upward slope moving from left to right.

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Exam 14: Environmental Health

The size of the sample is ______.

An assumption of regression analysis is homoscedasticity, which states that the

A 95% confidence interval will always be wider than a 95% prediction interval using the same value of x.

If two variables have a correlation coefficient equal to - 0.60 from a sample size of 5, we can conclude that the population correlation coefficient is less than zero using α = 0.05.

An assumption of a regression analysis is that the residuals exhibit no patterns across values for the dependent variable.

The correlation coefficient is a measure of the slope of the scatter plot for the independent and dependent variables.

The size of the sample is ______.

A correlation analysis requires that the data be either ______ data or ______ data.

The total sum of squares can never be negative.

The least squares method is a mathematical procedure used to identify the linear equation that best fits a set of ordered pairs.

The values of the correlation coefficient range between - 1.0 and +1.0.

The difference between the actual data value and the dependent variable is known as the residual.

If the slope of the simple regression equation is equal to zero, the scatter plot for the ordered pairs will be a vertical straight line indicating that there is no relationship between the independent and dependent variables.

The percentage of the variation in hours of sleep per night that is explained by the age of the adult is _____.

The ________ measures the variation in the dependent variable that is explained by variables other than the independent variable in simple regression analysis.

Using the regression equation to predict values for the dependent variable beyond the range of the data may provide results that are unreliable.

The size of the sample is _____.

A relationship is linear if the scatter plot of the independent and dependent variables has a straight- line pattern.

When the p- value for testing the significance of the regression slope is less than alpha, we conclude that there is a significant relationship between the dependent and independent variables.

If two variables have a correlation coefficient equal to +0.75, the scatter plot will have an upward slope moving from left to right.

Healthy Change

Psychosocial Health

Stress

Relationships and Sexuality

Reproductive Choices

Addiction and Drug Abuse

Alcohol and Tobacco

Nutrition

Weight Management and Body Image

Fitness

Cvd, Cancer, and Diabetes

Infectious Conditions

Violence and Unintentional Injuries

Consumerism and Complementary and Alternative Medicine

Forecasting Techniques and Analysis for Time Series Data

Filters

A correlation analysis requires that the data be either data or data.