5. Which descriptive statistics should be used to describe asymmetric, or skewed, distributions?

a. The mean and the standard deviation

b. The median and the standard error of the mean

c. The median and the range

d. The mean and the range

6. When making a statistical decision, the researcher should reject the null hypothesis if the P value is less than the significance level ().

a. True

b. False

7. Descriptive statistics summarize data from the _____, while inferential statistics indicate how well the data represents the _____.

a. Population / sample

b. Past / present

c. Sample / population

d. Classroom / world

8. Nominal and ordinal data are types of continuous data.

a. True

b. False

9. Which of the following is an example of ordinal data:

a. Temperature

b. Likert scales

c. Eye color

d. Blood pressure

10. Which measure can be calculated for nominal, ordinal, interval, and ratio data?

a. Range

b. Median

c. Mean

d. Mode

11. Standard deviation is the difference between the highest and lowest scores in the data set.

a. True

b. False

12. Parametric tests should only be used on data that is: a. Negatively correlated

b. Asymmetrical

c. Normally distributed

d. Positively skewed

13. When the alpha level is .05, which P value below would not be considered significant?

a. P=.078

b. P=.02

c. P=.001

d. P=.05

14. Inferential statistics are used to draw inferences about the results, but are not used to test the hypothesis of a study.

a. True

b. False

15. Which of the following is an example of a ratio measurement?

a. Weight

b. Likert scales

c. Hair color

d. Gender