Question 1

In the regression equation,what does the letter "a" represent?

Accepted Answer

A) Y intercept 
B) Slope of the line 
C) Any value of the independent variable that is selected 
D) None of these 
A) Y intercept 
B) Slope of the line 
C) Any value of the independent variable that is selected 
D) None of these

Question 2

A regression analysis yields the following information:   Compute the 95% confidence interval when X = 4.

Accepted Answer

A) 0.0,4.05 
B) 4.15,12.25 
C) 2.67,5.33 
D) 6.85,9.55 
A) 0.0,4.05 
B) 4.15,12.25 
C) 2.67,5.33 
D) 6.85,9.55

Question 3

If the coefficient of correlation is 0.68,the coefficient of determination is 0.4624.

Accepted Answer

A) True 
 B)False

Question 4

When testing the strength of the relationship between two variables,the alternate hypothesis is:

Accepted Answer

A) True 
 B)False

Question 5

An assumption of linear regression states that for each value of X,there is a group of Y values that are statistically __________________ and normally distributed about the regression line.

Accepted Answer

The answer of An assumption of linear regression states that...

Question 6

What does the coefficient of determination equal if r = 0.89?

Accepted Answer

A) 0.94 
B) 0.89 
C) 0.79 
D) 0.06 
A) 0.94 
B) 0.89 
C) 0.79 
D) 0.06

Question 7

What principle minimizes the sum of the squares of the vertical deviations about the line? _______________

Accepted Answer

Least squa

Question 8

What is the chart called when the paired data (the dependent and independent variables)are plotted?

Accepted Answer

A) Scatter diagram 
B) Bar chart 
C) Pie chart 
D) Histogram 
A) Scatter diagram 
B) Bar chart 
C) Pie chart 
D) Histogram

Question 9

What is the direction of a regression line if its slope equals zero,indicating a lack of a relationship? ____________________

Accepted Answer

The answer of What is the direction of a regression...

Question 10

The coefficient of determination is equal to or greater than zero.

Accepted Answer

A) True 
 B)False

Question 11

The coefficient of determination is the proportion of total variation in Y that is explained by X.

Accepted Answer

A) True 
 B)False

Question 12

The relationship between interest rates as a percent (X)and housing starts (Y)is given by the linear equation   = 4094 - 269X.
What happens to housing starts as interest rates fall? ________

Accepted Answer

The answer of The relationship between interest rates as a...

Question 13

If r = 0.65,what does the coefficient of determination equal?

Accepted Answer

A) 0.194 
B) 0.423 
C) 0.577 
D) 0.806 
A) 0.194 
B) 0.423 
C) 0.577 
D) 0.806

Question 14

In the regression equation,what does the letter "b" represent?

Accepted Answer

A) Y intercept 
B) Slope of the line 
C) Any value of the independent variable that is selected 
D) Value of Y when X = 0 
A) Y intercept 
B) Slope of the line 
C) Any value of the independent variable that is selected 
D) Value of Y when X = 0

Question 15

What is the variable used to predict the value of another called?

Accepted Answer

A) Independent variable 
B) Dependent variable 
C) Correlation variable 
D) Variable of determination 
A) Independent variable 
B) Dependent variable 
C) Correlation variable 
D) Variable of determination

In the regression equation,what does the letter "a" represent?

A regression analysis yields the following information: Compute the 95% confidence interval when X = 4.

If the coefficient of correlation is 0.68,the coefficient of determination is 0.4624.

When testing the strength of the relationship between two variables,the alternate hypothesis is:

An assumption of linear regression states that for each value of X,there is a group of Y values that are statistically __________________ and normally distributed about the regression line.

What does the coefficient of determination equal if r = 0.89?

What principle minimizes the sum of the squares of the vertical deviations about the line? _______________

What is the chart called when the paired data (the dependent and independent variables)are plotted?

What is the direction of a regression line if its slope equals zero,indicating a lack of a relationship? ____________________

The coefficient of determination is equal to or greater than zero.

The coefficient of determination is the proportion of total variation in Y that is explained by X.

The relationship between interest rates as a percent (X)and housing starts (Y)is given by the linear equation = 4094 - 269X. What happens to housing starts as interest rates fall? ________

If r = 0.65,what does the coefficient of determination equal?

In the regression equation,what does the letter "b" represent?

What is the variable used to predict the value of another called?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters

Exam 13: Linear Regression and Correlation

In the regression equation,what does the letter "a" represent?

A regression analysis yields the following information: Compute the 95% confidence interval when X = 4.

If the coefficient of correlation is 0.68,the coefficient of determination is 0.4624.

When testing the strength of the relationship between two variables,the alternate hypothesis is:

An assumption of linear regression states that for each value of X,there is a group of Y values that are statistically __________________ and normally distributed about the regression line.

What does the coefficient of determination equal if r = 0.89?

What principle minimizes the sum of the squares of the vertical deviations about the line? _______________

What is the chart called when the paired data (the dependent and independent variables)are plotted?

What is the direction of a regression line if its slope equals zero,indicating a lack of a relationship? ____________________

The coefficient of determination is equal to or greater than zero.

The coefficient of determination is the proportion of total variation in Y that is explained by X.

The relationship between interest rates as a percent (X)and housing starts (Y)is given by the linear equation = 4094 - 269X. What happens to housing starts as interest rates fall? ________

If r = 0.65,what does the coefficient of determination equal?

In the regression equation,what does the letter "b" represent?

What is the variable used to predict the value of another called?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters