Quiz 2

Question 1

______ variables are measured with more precision than ______ variables.

Answer 1

Ordinal; nominal

Question 2

A description of the amount of variation in a variable is called ______.

Answer 2

dispersion

Question 3

A key feature of an ordinal-level variable is that the values are

Answer 3

able to be ranked

Question 4

A percentile reports the percentage of cases in a distribution ______.

Answer 4

below a given value

Question 5

A researcher studies presidential approval polls and finds the following values: 46, 46, 48, 49, 51, and 52. What is the median approval rating?

Answer 5

48.5

Question 6

A researcher studies presidential approval polls and finds the following values: 46, 46, 48, 49, 51, and 52. What is the mean approval rating?

Answer 6

48.67

Question 7

A researcher who wants to learn the precise differences between his or her units of analysis will likely use a(n) ______-level variable to code the characteristics.

Answer 7

interval

Question 8

A table listing how many respondents to a survey reside in each state is called a ______.

Answer 8

frequency distribution

Question 9

Age, measured in years, is an example of a(n) ______-level variable.

Answer 9

interval

Question 10

Education coded as “high school diploma,” “some college,” “college graduate,” and “advanced degree” is an example of a(n) ______-level variable.

Answer 10

ordinal

Question 11

Every variable has one name and at least ______ value(s).

Answer 11

two

Question 12

In a study of the number of cups of coffee students drink while preparing for an exam a researcher learns that the median number of cups is 2, but the mean number of cups is 2.9. This indicates the skewness of the distribution is ______.

Answer 12

positively skewed

Question 13

Suppose a researcher studying attitudes on gun control finds 40 percent of respondents in favor and 40 percent of respondents opposed and the remaining 20 percent uncertain. The distribution of responses would be referred to as ______.

Answer 13

bimodal

Question 14

Suppose you knew the day of the month on which each of your classmates was born. The most frequently occurring day of birth is called the ______.

Answer 14

mode

Question 15

The cumulative percentage records the percentage of cases ______.

Answer 15

at or below a given level

Question 16

The median value of a variable is ______

Answer 16

the middle value

Question 17

Which of the following is an example of a measure of central tendency?

Answer 17

median

Question 18

Which of the following is an example of a nominal-level variable?

Answer 18

gender identity

Question 19

Which of the following is the most resistant measure of central tendency to skew?

Answer 19

median

Question 20

Which of the following variables has a median value?

Answer 20

percentage of eligible voters casting ballots in the United States

Question 21

A distribution with a skinnier left-hand tail is said to have a negative skew.

Answer 21

True

Question 22

A histogram shows the percentage or frequency of cases falling into intervals of the variable.

Answer 22

True

Question 23

A Likert-type scale is an additive index of five- or seven-point value ordinal variables.

Answer 23

True

Question 24

A method of describing the dispersion of a variable that includes the minimum value, lower quartile, median, upper quartile, and maximum value is called the interquartile range

Answer 24

False

Question 25

A researcher wants to measure individual support of internationalism so she creates an additive index or index consisting of multiple ordinal-level variables measuring attitudes on the U.N., foreign policy, foreign aid, and foreign intervention.

Answer 25

True

Question 26

A variable is an empirical measurement of a characteristic

Answer 26

True

Question 27

A variable that codes each state by the region of the country it is located in is called a nominal-level variable.

Answer 27

True

Question 28

A variable that measures per capita income by state as “low,” “medium,” or “high” is an interval-level variable.

Answer 28

False

Question 29

Age, measured in years, is an example of a nominal-level variable.

Answer 29

False

Question 30

Dispersion describes the number of categories in a variable

Answer 30

False

Question 31

Many nominal and ordinal variables have a singular central tendency that is captured clearly by the mode.

Answer 31

True

Question 32

Mean, median, and mode are all measures of dispersion.

Answer 32

False

Question 33

Nominal-level variables are the most precise.

Answer 33

False

Question 34

The percentage of voters who report voting twice a year or less is known as the cumulative percentage.

Answer 34

True

Question 35

The ranking in ordinal-level variables is reflected in the variable’s numeric codes

Answer 35

True