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. Which of the following experiments has more between-group variability?
-- Choose an answer --
a. Experiment A: Scores from no-treatment group: 2, 4, 6, 8, 10; scores from treatment group: 3, 5, 7, 9, 11.
b. Experiment B: Scores from no-treatment group: 2, 3, 4, 5, 6; scores from treatment group: 6, 7, 8, 9, 10.
2. _______ is sometimes called treatment variance.
-- Choose an answer --
a. Between-groups variance
b. Within-groups variance
3. The bigger the _______, the less likely that the treatment had a statistically significant effect.
-- Choose an answer --
a. Between-groups variability
b. Within-groups variability
4. In which experiment, are the results most likely to be statistically significant?
-- Choose an answer --
a. Experiment A: Scores from no-treatment group: 2, 4, 6, 8, 10; scores from treatment group: 3, 5, 7, 9, 11.
b. Experiment B: Scores from no-treatment group: 2, 3, 4, 5, 6; scores from treatment group: 6, 7, 8, 9, 10.
5. Between-groups variance may be affected by both random error and treatment effects.
-- Choose an answer --
a. True
b. False
6. Within-groups variance may be affected by both random error and treatment effects.
-- Choose an answer --
a. True
b. False
7. If F is 1, there is no evidence of a treatment effect.
-- Choose an answer --
a. True
b. False
8. To reduce the chances of making a Type 1 error, you should analyze the results of a six-group experiment using
-- Choose an answer --
a. Multiple t tests
b. ANOVA
9. In an ANOVA, you divide ____ by ____ .
-- Choose an answer --
a. Between-groups variance, within-groups variance
b. Within-groups variance, between-groups variance
10. If the numerator of your F test is 3, you have ___ groups.
-- Choose an answer --
a. 3
b. 4
11. If F (2, 24) = 16.00, p < .05, the study had
-- Choose an answer --
a. 26 participants
b. 27 participants
12. The F test on your multiple group experiment indicates that the treatment had an effect. To determine which groups are significantly differ from each other, you need to
-- Choose an answer --
a. Conduct post hoc tests
b. See which group means differ from each other
13. How many levels of treatment do you need to need to test for a double u-shaped line?
-- Choose an answer --
a. 3
b. 4
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