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. If you obtain a correlation of .20 in your sample, the variables are correlated in the population.
-- Choose an answer --
a. True
b. False
2. Which of the following correlations is more likely to be statistically significant?
-- Choose an answer --
a. A correlation of .30
b. A correlation of .60
3. You find a correlation of .40. That correlation is most likely to be significant if your correlation is based on ____ observations.
-- Choose an answer --
a. 20
b. 40
4. The only way to analyze data from correlational research is to use correlation coefficients.
-- Choose an answer --
a. True
b. False
5. The median split is the best way to analyze correlational data.
-- Choose an answer --
a. True
b. False
6. The median of the following the following numbers1, 2, 3, 12, 100 is 3.
-- Choose an answer --
a. True
b. False
7. The median split allows you to have more power than a test that determines whether a correlation coefficient is greater than zero.
-- Choose an answer --
a. True
b. False
8. An ANOVA allows you to have more power than a test that determines whether a correlation coefficient is greater than zero.
-- Choose an answer --
a. True
b. False
9. Unlike a test that determines whether a correlation coefficient is greater than zero, a multiple group ANOVA allows you to test for nonlinear relationships.
-- Choose an answer --
a. True
b. False
10. Unlike a test that determines whether a correlation coefficient is greater than zero, a multiple group ANOVA allows you to look at two or more predictors at once time.
-- Choose an answer --
a. True
b. False
11. You do a
t
test on correlational data. If you get a statistically significant effect, you can conclude that the predictor variable has an effect.
-- Choose an answer --
a. True
b. False
12. If you do many analyses using a p = .05 level of significance, your chance of making one or more false alarms (a Type I error) is about 5%.
-- Choose an answer --
a. True
b. False
13. Maria obtains several statistically significant correlations. Her results are most likely to be significant at the .05 level in a different sample if, in her original study, she
-- Choose an answer --
a. Used a p value of .05
b. Used a p value of .001
14. If you did a study using 30 participants and obtained null results, you might have obtained significant results had you used 60 participants.
-- Choose an answer --
a. True
b. False
You got
out of
correct.
Your Score:
%