1. Which type of statistics are used to summarize large amounts of data so that they become more
meaningful and easier to communicate to others?
a. descriptive
b. inferential
c. nominal
d. ordinal
2. Which type of statistics are used for decision-making, for generalizing from small samples, and for
drawing conclusions?
a. descriptive
b. inferential
c. nominal
d. ordinal
3. Inferential statistics are used to
a. “boil down” numbers.
b. summarize numbers.
c. calculate measures of central tendency.
d. generalize from small samples.
4. A psychologist concludes his method would be effective for teaching math to all third graders on the
basis of testing it on a selected group of third graders with a control group for comparison. He is
making use of
a. descriptive statistics.
b. correlations.
c. inferential statistics.
d. z-scores.
, a. descriptive
b. ordinal
c. inferential
d. nominal
ANS: A PTS: 1 DIF: Difficult REF: Why Numbers?
OBJ: A.1.1 KEY: Application MSC: * (New Question)
6. In order to make decisions regarding the best reading program to use, Hope will be
generalizing from the results of small samples of students. Hope is using __________
statistics.
a. descriptive
b. ordinal
c. inferential
d. nominal
ANS: C PTS: 1 DIF: Difficult REF: Why Numbers?
OBJ: A.1.1 KEY: Application MSC: * (New Question)
7. Regarding statistics, which of the following statements is FALSE?
a. Statistics help us draw valid conclusions about what we have observed.
b. Statistics bring greater clarity and precision to psychological thought and research.
c. There are two major types of statistics: frequency and graphical.
d. Psychologists use statistics because they often have to base decisions on a limited amount
of data.
ANS: C PTS: 1 DIF: Moderate
REF: Why Numbers? | Descriptive Statistics-Psychology by the Numbers
OBJ: A.1.1 KEY: Concept
8. After administering a unit test to her psychology students, a college professor calculates the mean and
range for this test in order to better understand the performance of her students on the material in this
unit. This professor is using __________statistics.
a. descriptive
b. inferential
c. nominal
d. ordinal
ANS: A PTS: 1 DIF: Difficult
REF: Why Numbers? | Descriptive Statistics-Psychology by the Numbers
OBJ: A.1.1 KEY: Application
, ANS: C PTS: 1 DIF: Difficult
REF: Why Numbers? | Descriptive Statistics-Psychology by the Numbers
OBJ: A.1.1 KEY: Concept
10. Graphical statistics, measures of central tendency, and measures of variability are the three basic types
of __________statistics.
a. nominal
b. inferential
c. descriptive
d. ordinal
ANS: C PTS: 1 DIF: Moderate
REF: Descriptive Statistics-Psychology by the Numbers OBJ: A.1.1
KEY: Fact MSC: www
11. Which of the following is NOT one of the three types of descriptive statistics?
a. graphical statistics
b. inferential statistics
c. measures of central tendency
d. measures of variability
ANS: B PTS: 1 DIF: Moderate
REF: Descriptive Statistics-Psychology by the Numbers OBJ: A.1.1
KEY: Fact
12. Graphical statistics fall into the category of
a. nominal scales.
b. ordinal scales.
c. descriptive statistics.
d. inferential statistics.
ANS: C PTS: 1 DIF: Moderate
REF: Descriptive Statistics-Psychology by the Numbers OBJ: A.1.1
KEY: Fact
13. Melissa is using the three measures of central tendency, which is a type of
a. nominal scale.
b. ordinal scale.
c. descriptive statistic.
d. inferential statistic.
ANS: C PTS: 1 DIF: Moderate
REF: Descriptive Statistics-Psychology by the Numbers OBJ: A.1.1
KEY: Application MSC: * (New Question)
14. Measures of variability belong to which of the following?
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