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. The average score for your treatment group participants provides an estimate of what the average score would have been had all your participants received the treatment.
-- Choose an answer --
a. True
b. False
2. To find the effect of the treatment, subtract the control group mean from the treatment group mean.
-- Choose an answer --
a. True
b. False
3. If scores within a group differ, these differences are due to random error.
-- Choose an answer --
a. True
b. False
4. From the three randomly selected scores from the control group of two experiment below, which experiment probably has greater within-group variability.
-- Choose an answer --
a. Experiment A: 6, 7, 8
b. Experiment B: 0, 2, 19
5. Using reliable measures and standardized procedures will reduce within-groups variability
-- Choose an answer --
a. True
b. False
6. Between-groups variability is due, at least in part, to random error.
-- Choose an answer --
a. True
b. False
7. In which case, are the results most likely to be statistically significant?
-- Choose an answer --
a. The experimental group scored two points higher than the control group
b. The experimental group scored four points higher than the control group
8. The larger the within-groups variability, the larger the difference between the treatment group and the control group must be to be statistically significant.
-- Choose an answer --
a. True
b. False
9. Experiments that study more participants are more likely to obtain statistically significant results.
-- Choose an answer --
a. True
b. False
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