Test Yourself
Take this quiz and see how you do. Select the correct answers by using the drop down menus. Once you are done, click submit to see your score! The ones that you get wrong will have a check!
1. Your criterion variable should be plotted on the x-axis.
-- Choose an answer --
a. True
b. False
2. "The higher a participant´s self-esteem, the higher the participant´s grade point average is likely to be " describes a ____ correlation.
-- Choose an answer --
a. Negative
b. Positive
3. The correlation between grade point average and attendance is probably
-- Choose an answer --
a. Positive
b. Negative
4. "The higher a participant´s impulsivity, the lower the participant´s grade point average is likely to be " describes a ____ correlation.
-- Choose an answer --
a. Negative
b. Positive
5. The correlation between height and balance beam performance is probably
-- Choose an answer --
a. Negative
b. Positive
6. A negative correlation is weaker than a zero correlation.
-- Choose an answer --
a. True
b. False
7. If a line through a scatterplot slopes downward the correlation is
-- Choose an answer --
a. Negative
b. Positive
8. If there is a nonlinear relationship between two variables, the correlation coefficient will tend to underestimate the degree to which those two variables are related.
-- Choose an answer --
a. True
b. False
9. The weaker the relationship, the smaller the coefficient of determination will tend to be.
-- Choose an answer --
a. True
b. False
10. If the correlation coefficient is -.5, the coefficient of determination will be
-- Choose an answer --
a. 0
b. .25
11. A correlation of -.50 is weaker than a correlation of -.30.
-- Choose an answer --
a. True
b. False
12. A correlation of +.10 is more useful for improving the accuracy of predictions than a correlation of -.20.
-- Choose an answer --
a. True
b. False
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