Deck 16: Predicting Who’ll Win the Super Bowl: Using Linear Regression

Question 1

What is another name for a regression line?

A) Line of best fit
B) Scatterplot line
C) Line graph
D) Line of the estimate

Answer 1

A

Question 2

Using the regression formula with slope = .704 and intercept = .719, what would the predicted college GPA be for a student whose current high school GPA = 3.2?

A) 2.97
B) 2.69
C) 3.00
D) 3.20

Answer 2

A

Question 3

Which of the following is the point at which the regression line crosses the y-axis?

A) Intercept
B) Predicted score
C) Criterion score
D) Slope

Answer 3

A

Question 4

Which of the following Excel functions calculated the point at which the regression line crosses the y-axis?

A) SLOPE
B) CORREL
C) INTERCEPT
D) PEARSON

Question 5

Which of the following is like a standard deviation for all error scores in regression?

A) Error of the estimate
B) Error standard deviation
C) Standard error of estimate
D) Precision of error

Question 6

What can be used as the basis for prediction?

A) t test
B) Correlation
C) F test
D) Cohen's d

Question 7

Which of the following symbols is associated with the independent variable in the regression equation?

A) X
B) Y
C) a
D) b

Question 8

Which of the following symbols is associated with the y-intercept in the regression equation?

A) X
B) Y
C) a
D) b

Question 9

Which of the following symbols is associated with the predicted score in the regression equation?

A) X
B) Y
C) a
D) b

Question 10

Which of the following symbols is associated with the slope in the regression equation?

A) X
B) Y
C) a
D) b

Question 11

What is the distance between each data point and the regression line called?

A) Error of estimate
B) Standard error of estimate
C) Standard deviation
D) Standardized error

Question 12

Which of the following is used to illustrate the "best guess" as to the predicted Y variable score based on X?

A) Regression equation
B) Scatterplot
C) Standard error of the estimate
D) Regression line

Question 13

How would you represent the predicted score of Y based on a known value of X?

A) Y
B) y-intercept
C) Y?
D) Y = Xa

Question 14

How is the symbol Y? interpreted?

A) Y intercept
B) Y predictor
C) Y prime
D) Y score

Question 15

In regression, what is the criterion variable also known as?

A) Independent variable
B) Dependent variable
C) Predictor variable
D) Correlated variable

Question 16

Which of the following determines the direction of the regression line?

A) Intercept
B) Predicted score
C) Criterion score
D) Slope

Question 17

What statistical technique is used to make predictions of future outcomes based on present data?

A) Analysis of variance
B) Repeated measures
C) Linear regression
D) Correlational analysis

Question 18

What must be done to categorical variables in order to use them in a regression analysis?

A) Nothing
B) Dummy coding
C) Problem coding
D) Categorical coding

Question 19

Which of the following is the correct formula for linear regression?

A) X? = aY + b
B) Y? = aX + b
C) Y? = bX + a
D) X? = bY + a

Question 20

A positive trend line is associated with what type of slope?

A) Negative slope
B) Direct slope
C) Positive slope
D) Nondirectional slope

Question 21

Explain what the regression line represents by naming three things that it allows us to examine.

Question 22

What does X? represent in the multiple regression formula?

Question 23

Write the equation for linear regression. What do the symbols represent?

Question 24

What is the standard error of estimate? What does it allow us to examine?

Question 25

What must be used to examine an outcome that is predicted from two independent variables?

Question 26

In order to use two predictor variables, what must be the case concerning the variables?

Question 27

If the correlation between X and Y is equal to -1.0, what do we know about the prediction of Y by X?

Question 28

How would the regression equation change if there were two predictors? Write the equation for two predictor variables.

Question 29

When using multiple predictor variables in regression, what are the "big rules" one must follow?

Question 30

What are the dependent and independent variables usually referred to as in regression?