class 5

Question 1

Which of these graphs can be used to display categorical data?
a. Bar chart
b. Histogram
c. Both of them
d. None of them

Answer 1

a

Question 2

The height of a bar in a bar chart conveys:
a. Absolute frequency of scores
b. Percentage of scores
c. Either absolute frequencies or percentages
d. Neither absolute frequencies nor percentages

Answer 2

c

Question 3

The sum of all frequencies at and below a given variable in a study is known as _____________.
a. Cumulative frequency
b. Relative frequency
c. Absolute frequency
d. Histogram

Answer 3

a

Question 4

When cumulating frequencies from the bottom up, you typically want to discuss the data in
terms of:
a. At or below.
b. All of the above
c. None of them
d. Both of them

Answer 4

a

Question 5

A table listing how many respondents to a survey reside in each state is called a ______.
a. Bar table
b. Pie table
c. Histogram
d. Frequency table

Answer 5

d

Question 6

A bottom up cumulative percentage records the percentage of cases ______.
a. Below a given level
b. Above a given level
c. At or below a given level
d. At or above a given level

Answer 6

c

Question 7

A researcher distributes frequencies into the following classes: absent, tardy, and present. What
type of data is distributed?
a. Categorical data
b. Qualitative data
c. Discrete data
d. All of these

Answer 7

d

Question 8

The sum of proportions for a variable is ______.
a. Equal to 1.00
b. Equal to 100%
c. Equal to the total number of values in a distribution
d. Equal to the total number of cases in the sample

Answer 8

a

Question 9

A graphical display for frequency distributions with continuous data is called a ______.
a. Bar chart
b. Pie chart
c. Histogram
d. Frequency chart

Answer 9

c

Question 10

A researcher measures the time (in seconds) that it takes children to complete a basic reading
skills task. What type of graphical display would be most appropriate for summarizing the
frequency of children falling into different intervals of time?
a. Bar chart
b. Histogram
c. Pie chart
d. All of these are fine

Answer 10

b

Question 11

Which characteristic of a histogram implies that it summaries continuous data?
a. The data are plotted on the y-axis.
b. The vertical bars touch each other.
c. The height of the vertical bars are not restricted.
d. The x-axis lists data on a nominal scale of measurement.

Answer 11

b

Question 12

Which of the following is a type of graphical display used to summarize qualitative, discrete
data?
a. Bar chart
b. Pie chart
c. Histogram
d. Both A and B

Answer 12

d

Question 13

A researcher records the number of children at a local school from single-, divorced-, and
married-parent homes. The raw frequencies of these data would be best displayed as a ______.
a. Bar chart
b. Pie chart
c. Histogram
d. Any of them

Answer 13

a

Question 14

Bar charts are a lot like histograms, except ______.
a. The bar chart summarizes quantitative data
b. The bar chart summarizes continuous data
c. The bars displayed in the graph do not touch
d. All of these

Answer 14

c

Question 15

To construct a pie chart, first distribute the data as ______.
a. Cumulative percentages
b. Relative percentages
c. Cumulative frequencies
d. Cumulative relative percentages

Answer 15

b

Question 16

A researcher measures the weight (in grams) of newborn infants in the month of March. What
type of graphical display would be most appropriate for summarizing the frequency of infants
falling into different intervals of weight?
a. Histogram
b. Bar chart
c. Pie chart
d. All of these

Answer 16

a

Question 17

True or false: Whether you cumulate a frequency distribution from the bottom up or the top
down depends on how you want to discuss the data.

Answer 17

true

Question 18

True or False: A pie chart is typically used to summarize continuous data.

Answer 18

false

Question 19

True or False: The percentage of citizens who report going to the church twice a year or less is known as a cumulative percentage.

Answer 19

true (given that in the survey “once a year” and “twice a year” are two different values

Question 20

True or False: A histogram shows the percentage or frequency of cases falling into ranges of a
variable’s values.

Answer 20

true

Question 21

True or false: Summarizing data in a table or graph can make it easier to see patterns in the
data.

Answer 21

true

Question 22

True or false: Frequency distributions summarize the average scores in a set of data.

Answer 22

false

Question 23

True or false: Grouped frequency distributions are used to summarize quantitative data that
are continuous or discrete.

Answer 23

true

Question 24

True or false: Frequency distributions can be used to summarize both categorical and interval variables.

Answer 24

true

Question 25

True or false: The sum of the frequencies for a distribution is 100. This means that fewer than 100 persons were counted.

Answer 25

false

Question 26

True or false: A histogram is basically a bar chart in which the bars do not touch.

Answer 26

false

Question 27

True or false: In a bar chart, each category is represented by a rectangle, and each rectangle is separated (does not touch) along the x-axis.

Answer 27

true

Question 28

True or false: A circular graph that displays the relative percentage of a frequency distribution into sectors is called a histogram.

Answer 28

false

Question 29

True or false: Bar charts are used to summarize discrete and categorical data.

Answer 29

true

Question 30

True or false: To summarize relative percent data, we can use a pie chart.

Answer 30

true