Quiz 2 Flashcards
______ variables are measured with more precision than ______ variables.
Ordinal; nominal
A description of the amount of variation in a variable is called ______.
dispersion
A key feature of an ordinal-level variable is that the values are
able to be ranked
A percentile reports the percentage of cases in a distribution ______.
below a given value
A researcher studies presidential approval polls and finds the following values: 46, 46, 48, 49, 51, and 52. What is the median approval rating?
48.5
A researcher studies presidential approval polls and finds the following values: 46, 46, 48, 49, 51, and 52. What is the mean approval rating?
48.67
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.
interval
A table listing how many respondents to a survey reside in each state is called a ______.
frequency distribution
Age, measured in years, is an example of a(n) ______-level variable.
interval
Education coded as “high school diploma,” “some college,” “college graduate,” and “advanced degree” is an example of a(n) ______-level variable.
ordinal
Every variable has one name and at least ______ value(s).
two
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 ______.
positively skewed
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 ______.
bimodal
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 ______.
mode
The cumulative percentage records the percentage of cases ______.
at or below a given level
The median value of a variable is ______
the middle value
Which of the following is an example of a measure of central tendency?
median
Which of the following is an example of a nominal-level variable?
gender identity
Which of the following is the most resistant measure of central tendency to skew?
median
Which of the following variables has a median value?
percentage of eligible voters casting ballots in the United States
A distribution with a skinnier left-hand tail is said to have a negative skew.
True
A histogram shows the percentage or frequency of cases falling into intervals of the variable.
True
A Likert-type scale is an additive index of five- or seven-point value ordinal variables.
True
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
False
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.
True
A variable is an empirical measurement of a characteristic
True
A variable that codes each state by the region of the country it is located in is called a nominal-level variable.
True
A variable that measures per capita income by state as “low,” “medium,” or “high” is an interval-level variable.
False
Age, measured in years, is an example of a nominal-level variable.
False
Dispersion describes the number of categories in a variable
False
Many nominal and ordinal variables have a singular central tendency that is captured clearly by the mode.
True
Mean, median, and mode are all measures of dispersion.
False
Nominal-level variables are the most precise.
False
The percentage of voters who report voting twice a year or less is known as the cumulative percentage.
True
The ranking in ordinal-level variables is reflected in the variable’s numeric codes
True
