Thinking About Psychology, Second Edition

Module 5: Psychology’s Statistics

iClicker Questions

Charles T. Blair-BroekerRandal M. Ernst

Questions Written by Kent Korek, Germantown High School

1. According to our textbook, the primary purpose of statistics is to:

a. prove a hypothesis.

b. determine statistical significance.

c. compare scores from one numbering system with a different one.

d. make data meaningful.

2. Mr. Bartolone gave a quiz to his Social Problems class. The scores

were 2, 3, 5, 10, 15. The mean for the class quiz is:

a. 35.

b. 7.

c. 5.

d. 13.

3. The basketball coach was compiling information on the heights of her players. The following data was

collected on the player’s height (in inches): 70, 71, 72, 72, 74, 74, 75.

What is the median height of the team?

a. 74

b. 71

c. 73

d. 72

4. A skewed distribution is:

a. normal.

b. distorted.

c. impossible to graph.

d. when the mean, median and mode are all the same.

5. The following are the closing prices of a stock over a two week period: 34,

32, 30, 45, 34, 43, 35, 38, 45, 38. What is the range of these prices?

a. 15

b. 36.5

c. 45

d. 38

6. Professor Martinez gave a unit test to her introductory psychology class. To her surprise the standard deviation of the test scores was 0 (zero). This

means:

a. everyone passed the test.

b. the mean, median and mode for the test were all the same.

c. the scores followed a normal distribution.

d. the distribution was skewed.

7. Keith took both the ACT and the SAT. He wants to compare the two

scores but each is on a different scoring system. In order to compare

his two scores, Keith should make use of:

a. standard deviation.

b. percentile rank.

c. measures of central tendency.

d. frequency distribution.

8. If two variables are not related in any way their correlation would be:

a. 0

b. +0.5

c. -0.5

d. +1

9. In order to determine if the independent variable has influenced the dependent variable and the data within our experiment supports our hypothesis, an experimenter must

make use of:

a. correlations.

b. standard deviation.

c. inferential statistics.

d. measures of central tendency.

10. Which of the following are factors involved in inferential statistics?

a. the difference between the two groups’ means

b. the number of participants

c. the standard deviation between the two groups

d. all of the above