Math-110-elementary-statistics-module-2
2025 with 100% Correct Answers
frequency distribution Correct AnswersA tabular summary of data showing the number (frequency) of
observations in each of several distinctive (nonoverlapping) categories or classes.
relative frequency Correct AnswersA ratio that compares the frequency of each category to the total.
frequency of the class / n where n = total count of all classes
relative percentage Correct Answerspercentage of time the value occurs in the sample or population
relative frequency x 100
charting Correct Answersa means to represent frequencies visually
column chart Correct AnswersData graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
bar chart Correct AnswersData graphed as a series of horizontal bars
x-axis: frequency of class
y-axis: class
pie chart Correct Answersa chart that shows the relationship of a part to a whole
best suited for the distributions focused on the proportions
3 step method to group numerical data into classes Correct Answers1. determine the number of classes
to be evaluated
2. determine the width of each class
, 3. determine the limits of each class
Number of classes Correct Answers(usu b/w 5 and 20)
less than 25 > 5 to 6
25 to 50 > 7 to 14
More than 50 > 15-20
Width of class Correct Answersapprox width =
(largest data value - smallest data value) / # of classes
qualitative data Correct Answersfrequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
quantitative data Correct Answersfrequency distributions
relative frequency distributions
percent frequency distributions
Graphical: histograms
positive relationship Correct Answersan association between two variables in which they increase or
decrease together
negative relationship Correct Answersan association between two variables in which one increases
while the other decreases
no relationship Correct Answersas one variable increases the other stays the same
measures of central tendency Correct Answersmean, median, mode
2025 with 100% Correct Answers
frequency distribution Correct AnswersA tabular summary of data showing the number (frequency) of
observations in each of several distinctive (nonoverlapping) categories or classes.
relative frequency Correct AnswersA ratio that compares the frequency of each category to the total.
frequency of the class / n where n = total count of all classes
relative percentage Correct Answerspercentage of time the value occurs in the sample or population
relative frequency x 100
charting Correct Answersa means to represent frequencies visually
column chart Correct AnswersData graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
bar chart Correct AnswersData graphed as a series of horizontal bars
x-axis: frequency of class
y-axis: class
pie chart Correct Answersa chart that shows the relationship of a part to a whole
best suited for the distributions focused on the proportions
3 step method to group numerical data into classes Correct Answers1. determine the number of classes
to be evaluated
2. determine the width of each class
, 3. determine the limits of each class
Number of classes Correct Answers(usu b/w 5 and 20)
less than 25 > 5 to 6
25 to 50 > 7 to 14
More than 50 > 15-20
Width of class Correct Answersapprox width =
(largest data value - smallest data value) / # of classes
qualitative data Correct Answersfrequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
quantitative data Correct Answersfrequency distributions
relative frequency distributions
percent frequency distributions
Graphical: histograms
positive relationship Correct Answersan association between two variables in which they increase or
decrease together
negative relationship Correct Answersan association between two variables in which one increases
while the other decreases
no relationship Correct Answersas one variable increases the other stays the same
measures of central tendency Correct Answersmean, median, mode
