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. "Do you surf the web?" provides
-- Choose an answer --
a. Interval data
b. Nominal data
2. If you are interested in amounts of a quality, you need
-- Choose an answer --
a. Interval data
b. Nominal data
3. If you have nominal data, you can summarize them using means.
-- Choose an answer --
a. True
b. False
4. If you have nominal data, you should describe relationships between pairs of variables using a
-- Choose an answer --
a. Pearson r
b. Phi coefficient
5. The mean (on a 1 to 5 scale) is 3. The standard error is 2. In this case, it would not make sense to construct a 95 percent confidence interval.
-- Choose an answer --
a. True
b. False
6. To determine whether women study more than men, you should
-- Choose an answer --
a. Get the mean time studied for each group and see whether the mean for women was larger than the mean for men
b. Compute a t test between the groups to see if women studied significantly longer than men.
7. You do 100 t tests. Each t test uses a .05 level of significance. Your chances of a Type 1 error (a false alarm) are
-- Choose an answer --
a. About .05
b. Much greater than .05
8. You have nominal data. To look at the difference between two groups, you should use
-- Choose an answer --
a. a chi-square test
b. a t test
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