OPRE 3360 COMPREHENSIVE STUDY PAPER
2026 QUESTIONS WITH ANSWERS
GRADED A+
◉Frequency Distributions. Answer: A tabular summary of data
showing the frequency (or number) of items in each of several non-
overlapping classes.
◉Relative Frequency Distribution. Answer: A tabular summary
showing the relative frequency for each class.
Relative Frequency Distribution:
Frequency of the class/n
n = the # of observations in the data set
◉Percent Frequency Distributions. Answer: A tabular summary
showing the percent frequency of the data for each class.
% Frequency of a class = relative frequency X 100%
, ◉Bar Charts. Answer: A graphical device for depicting categorical
data summarized in a frequency, relative frequency or percent
frequency distribution.
◉Pareto Diagram. Answer: A bar chart where the bars are arranged
in descending order of height from left to right. (The most frequently
occurring category appears first)
◉Pie Chart. Answer: A graphical device for presenting relative
frequency and percent frequency distributions.
◉Frequency Distribution (Quantitative data). Answer: 3 steps to
define classes for frequency distribution using quantitative data:
1) Determine # of non-overlapping classes
> as a general guideline use between 5-20 classes
2) Determine width of each class
> Approx. class width = (largest data value - smallest data value)/ #
of classes
3) Determine the class limits
> Class limits must be chosen so that each data item belongs to one
and only one class - lower class limit and upper class limit
2026 QUESTIONS WITH ANSWERS
GRADED A+
◉Frequency Distributions. Answer: A tabular summary of data
showing the frequency (or number) of items in each of several non-
overlapping classes.
◉Relative Frequency Distribution. Answer: A tabular summary
showing the relative frequency for each class.
Relative Frequency Distribution:
Frequency of the class/n
n = the # of observations in the data set
◉Percent Frequency Distributions. Answer: A tabular summary
showing the percent frequency of the data for each class.
% Frequency of a class = relative frequency X 100%
, ◉Bar Charts. Answer: A graphical device for depicting categorical
data summarized in a frequency, relative frequency or percent
frequency distribution.
◉Pareto Diagram. Answer: A bar chart where the bars are arranged
in descending order of height from left to right. (The most frequently
occurring category appears first)
◉Pie Chart. Answer: A graphical device for presenting relative
frequency and percent frequency distributions.
◉Frequency Distribution (Quantitative data). Answer: 3 steps to
define classes for frequency distribution using quantitative data:
1) Determine # of non-overlapping classes
> as a general guideline use between 5-20 classes
2) Determine width of each class
> Approx. class width = (largest data value - smallest data value)/ #
of classes
3) Determine the class limits
> Class limits must be chosen so that each data item belongs to one
and only one class - lower class limit and upper class limit
