Chapter 3 Learning Checks--Correlation & Regression.

First set

1. A variable that is considered to be a cause is called a(n)

a. dependent variable.
b. linear variable.
c. independent variable.
d. criterion variable.

2. In prediction with one predictor variable, the optimal number to use for beta (standardized regression coefficient) is the

a. proportionate reduction in error.
b. correlation coefficient.
c. sum of squared errors.
d. regression constant.

3. In a perfect linear correlation, the dots in a scatter diagram all fall _______________.

4. When high scores go with high scores, and low with low, the correlation coefficient will be between _________ and __________.

5. If you predict a person's college GPA from the person's SAT score, the SAT score is called the _________ variable.

Second set

1. Which of the following is the most likely way for the correlation coefficient to be presented in a research article?

a. p = .05, r < .52
b. p > .05, r(.52)
c. r(.52), p < .05
d. r = .52, p < .05

2. A person's predicted Z score on the dependent variable is found by multiplying that person's Z score on the predictor variable by the

a. coefficient of redundancy.
b. regression constant.
c. proportionate reduction in error.
d. standardized regression coefficient.

3. In a scatter diagram, the predictor variable goes on the _________ axis.

4. A(n) __________ is a table showing the correlations among several variables.

Page 1

1. c

2. b

3. on a straight line

4. 0; 1

5. predictor.

1. d

2. d

3. horizontal

4. correlation matrix