Portage Math 110 Elementary Statistics (Module 2)
questions and answers 2025\2026 A+ Grade
a tabular representation of the summary data that shows the numerical count of items in each class in
the data set
- correct answer frequency distribution
data cannot overlap. An overlap will result in double counting an item and will lead to erroneous results
- correct answer what needs to be avoided in frequency distribution and why
A ratio that compares the frequency of each category to the total.
frequency of the class / n where n = total count of all classes
- correct answer relative frequency
percentage of time the value occurs in the sample or population
relative frequency x 100
- correct answer relative percentage
a means to represent frequencies visually
- correct answer charting
Data graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
- correct answer column chart
Data graphed as a series of horizontal bars
opposite x/y axis of column
- correct answer bar chart
, -shows the relationship of a part to a whole
-best suited for the distributions focused on the proportions
- correct answer pie chart
1. determine the number of classes to be evaluated
2. determine the width of each class
3. determine the limits of each class
- correct answer 3 step method to group numerical data into classes
1) the number of items in the data set 2) the range of the data (i.e. the largest minus the smallest data
value)
- correct answer two criteria to use in determining the number of classes are: (step 1)
you want as few as possible
- correct answer what to remember when making number of classes?
approx width =
(largest data value - smallest data value) / # of classes
- correct answer Width of class (step 2)
set the upper and lower limits for each class such that each value in the data set is counted in one class.
- correct answer Determine each class's limits (step 3)
frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
- correct answer qualitative data
frequency distributions
relative frequency distributions
percent frequency distributions
questions and answers 2025\2026 A+ Grade
a tabular representation of the summary data that shows the numerical count of items in each class in
the data set
- correct answer frequency distribution
data cannot overlap. An overlap will result in double counting an item and will lead to erroneous results
- correct answer what needs to be avoided in frequency distribution and why
A ratio that compares the frequency of each category to the total.
frequency of the class / n where n = total count of all classes
- correct answer relative frequency
percentage of time the value occurs in the sample or population
relative frequency x 100
- correct answer relative percentage
a means to represent frequencies visually
- correct answer charting
Data graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
- correct answer column chart
Data graphed as a series of horizontal bars
opposite x/y axis of column
- correct answer bar chart
, -shows the relationship of a part to a whole
-best suited for the distributions focused on the proportions
- correct answer pie chart
1. determine the number of classes to be evaluated
2. determine the width of each class
3. determine the limits of each class
- correct answer 3 step method to group numerical data into classes
1) the number of items in the data set 2) the range of the data (i.e. the largest minus the smallest data
value)
- correct answer two criteria to use in determining the number of classes are: (step 1)
you want as few as possible
- correct answer what to remember when making number of classes?
approx width =
(largest data value - smallest data value) / # of classes
- correct answer Width of class (step 2)
set the upper and lower limits for each class such that each value in the data set is counted in one class.
- correct answer Determine each class's limits (step 3)
frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
- correct answer qualitative data
frequency distributions
relative frequency distributions
percent frequency distributions
