MATH 110 STATISTICS MODULE 2 EXAM
GUIDE 2024|BRAND NEW EXAM QUESTIONS
AND CORRECT ANSWERS ALL GRADED
A+|GUARANTEED SUCCESS|LATEST UPDATE
2024-2025
frequency distribution - ANSWER-✔A tabular summary of data showing the number
(frequency) of observations in each of several distinctive (nonoverlapping) categories
or classes.
relative frequency - ANSWER-✔A 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 - ANSWER-✔percentage of time the value occurs in the sample
or population
relative frequency x 100
charting - ANSWER-✔a means to represent frequencies visually
column chart - ANSWER-✔Data graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
bar chart - ANSWER-✔Data graphed as a series of horizontal bars
x-axis: frequency of class
y-axis: class
pie chart - ANSWER-✔a 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 - ANSWER-✔1. 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 - ANSWER-✔(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 - ANSWER-✔approx width =
(largest data value - smallest data value) / # of classes
qualitative data - ANSWER-✔frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
quantitative data - ANSWER-✔frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: histograms
positive relationship - ANSWER-✔an association between two variables in which
they increase or decrease together
negative relationship - ANSWER-✔an association between two variables in which
one increases while the other decreases
no relationship - ANSWER-✔as one variable increases the other stays the same
measures of central tendency - ANSWER-✔mean, median, mode
"typical" or "average" value of a data set
sample mean - ANSWER-✔x bar
the arithmetic average value of the responses on a variable (sum of values / number
of observations)
population mean - ANSWER-✔μ (mu)
calculated mean of the entire population (sum of values in population / N = number
of observations in pop)
median - ANSWER-✔midpoint
the middle score in a distribution; half the scores are above it and half are below it
odd = middle number
even = average of two middle numbers
mode - ANSWER-✔The value that occurs most frequently in a given data set.
percentile - ANSWER-✔Specific point in a distribution of data that has a given
percentage of cases below it.
quartile - ANSWER-✔A division of the total into four intervals, each one
representing one-fourth of the total.
GUIDE 2024|BRAND NEW EXAM QUESTIONS
AND CORRECT ANSWERS ALL GRADED
A+|GUARANTEED SUCCESS|LATEST UPDATE
2024-2025
frequency distribution - ANSWER-✔A tabular summary of data showing the number
(frequency) of observations in each of several distinctive (nonoverlapping) categories
or classes.
relative frequency - ANSWER-✔A 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 - ANSWER-✔percentage of time the value occurs in the sample
or population
relative frequency x 100
charting - ANSWER-✔a means to represent frequencies visually
column chart - ANSWER-✔Data graphed as a series of vertical bars
x-axis: class
y-axis: frequency of class
bar chart - ANSWER-✔Data graphed as a series of horizontal bars
x-axis: frequency of class
y-axis: class
pie chart - ANSWER-✔a 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 - ANSWER-✔1. 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 - ANSWER-✔(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 - ANSWER-✔approx width =
(largest data value - smallest data value) / # of classes
qualitative data - ANSWER-✔frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: bar, column, pie charts
quantitative data - ANSWER-✔frequency distributions
relative frequency distributions
percent frequency distributions
Graphical: histograms
positive relationship - ANSWER-✔an association between two variables in which
they increase or decrease together
negative relationship - ANSWER-✔an association between two variables in which
one increases while the other decreases
no relationship - ANSWER-✔as one variable increases the other stays the same
measures of central tendency - ANSWER-✔mean, median, mode
"typical" or "average" value of a data set
sample mean - ANSWER-✔x bar
the arithmetic average value of the responses on a variable (sum of values / number
of observations)
population mean - ANSWER-✔μ (mu)
calculated mean of the entire population (sum of values in population / N = number
of observations in pop)
median - ANSWER-✔midpoint
the middle score in a distribution; half the scores are above it and half are below it
odd = middle number
even = average of two middle numbers
mode - ANSWER-✔The value that occurs most frequently in a given data set.
percentile - ANSWER-✔Specific point in a distribution of data that has a given
percentage of cases below it.
quartile - ANSWER-✔A division of the total into four intervals, each one
representing one-fourth of the total.
