MCGRAW CERTIFICATION EXAM QUESTIONS
AND VERIFIED ANSWERS 2026
▶ column chart . Answer: A vertical bar chart is often referred to as which
of the following?
Multiple choice question.
Column chart
Line chart
Pie chart
Horizontal chart
▶ frequency . Answer: For a numerical variable, a _________ distribution
groups data into intervals and records the number of observations that falls
into each interval.
▶ 1. Intervals are exhaustive
2. The total number of intervals in a frequency distribution usually ranges
from 5 to 20
3. Interval limits are easy to recognize and interpret . Answer: Select all that
apply
For a numerical variable, instead of categories, we construct a series of
intervals (sometimes called classes). We must make certain decisions
about the number of intervals, as well as the width of each interval. Which
of the following is a guideline for developing the intervals?
Multiple select question.
Intervals are exhaustive
The total number of intervals in a frequency distribution usually ranges from
5 to 20
Intervals are NOT mutually exclusive
Interval limits are easy to recognize and interpret
▶ Bar Chart . Answer: Which 'tool' depicts the frequency or the relative
frequency for each category of the categorical variable as a series of
horizontal or vertical bars, the lengths of which are proportional to the
values that are to be depicted.
Multiple choice question.
, Pie chart
Frequency distribution
Hypothesis test
Bar chart
▶ Positively skewed
Negatively skewed
Symmetric . Answer: Select all that apply
Which of the following are valid shapes of a histogram?
Multiple select question.
Positively skewed
Negatively skewed
Correlated
Symmetric
▶ 252 . Answer: We asked 1000 respondents whether they preferred
Online teaching, hybrid teaching, or attending class in person. The relative
frequency of the Online teaching proponents was point 252 or (.252). How
many respondents preferred online teaching?
Multiple choice question.
748
There is no way to know
252
We can identify the relative frequency, but not the frequency
▶ When creating a bar chart or a histogram, each bar/rectangle should be
of the same width
Axes should be clearly marked and labeled . Answer: Select all that apply
Which of the basic guidelines should you follow when constructing or
interpreting charts or graphs? Choose all that apply!
Multiple select question.
When creating a bar chart or a histogram, each bar/rectangle should be of
the same width
Give high values for upper limits on a graph
The prettiest graph should be used for a given set of data
Axes should be clearly marked and labeled
▶ 4 . Answer: If a bar chart depicts the relative frequency for type of
occupations (with options as Doctor, Professor, Athlete, or Actor) as the
AND VERIFIED ANSWERS 2026
▶ column chart . Answer: A vertical bar chart is often referred to as which
of the following?
Multiple choice question.
Column chart
Line chart
Pie chart
Horizontal chart
▶ frequency . Answer: For a numerical variable, a _________ distribution
groups data into intervals and records the number of observations that falls
into each interval.
▶ 1. Intervals are exhaustive
2. The total number of intervals in a frequency distribution usually ranges
from 5 to 20
3. Interval limits are easy to recognize and interpret . Answer: Select all that
apply
For a numerical variable, instead of categories, we construct a series of
intervals (sometimes called classes). We must make certain decisions
about the number of intervals, as well as the width of each interval. Which
of the following is a guideline for developing the intervals?
Multiple select question.
Intervals are exhaustive
The total number of intervals in a frequency distribution usually ranges from
5 to 20
Intervals are NOT mutually exclusive
Interval limits are easy to recognize and interpret
▶ Bar Chart . Answer: Which 'tool' depicts the frequency or the relative
frequency for each category of the categorical variable as a series of
horizontal or vertical bars, the lengths of which are proportional to the
values that are to be depicted.
Multiple choice question.
, Pie chart
Frequency distribution
Hypothesis test
Bar chart
▶ Positively skewed
Negatively skewed
Symmetric . Answer: Select all that apply
Which of the following are valid shapes of a histogram?
Multiple select question.
Positively skewed
Negatively skewed
Correlated
Symmetric
▶ 252 . Answer: We asked 1000 respondents whether they preferred
Online teaching, hybrid teaching, or attending class in person. The relative
frequency of the Online teaching proponents was point 252 or (.252). How
many respondents preferred online teaching?
Multiple choice question.
748
There is no way to know
252
We can identify the relative frequency, but not the frequency
▶ When creating a bar chart or a histogram, each bar/rectangle should be
of the same width
Axes should be clearly marked and labeled . Answer: Select all that apply
Which of the basic guidelines should you follow when constructing or
interpreting charts or graphs? Choose all that apply!
Multiple select question.
When creating a bar chart or a histogram, each bar/rectangle should be of
the same width
Give high values for upper limits on a graph
The prettiest graph should be used for a given set of data
Axes should be clearly marked and labeled
▶ 4 . Answer: If a bar chart depicts the relative frequency for type of
occupations (with options as Doctor, Professor, Athlete, or Actor) as the
