Box and Whisker Plot
Ms. Rodriguez English class took a final test. The following grades obtain from her 27 students were the following:
70,72,60,63,85,99,90,69,77,65
71,73,66,73,94,81,89,84,76,91
79,82,74,83,79,82,90
Write the data from least to greatest.
Median
Maximum
Minimum
60 63 65 66 69 70 71 72 73 73 74 76 77 79 79 81 82 82 83 84 85 89 90 90 91 94 99
Quartile 1




The Maximum number
will be the greatest
number and the
minimum number will be
the least number.
The mean will be find by
adding all the numbers
and dividing the total by
the data numbers.
The median will be find
by putting the numbers
from least to greatest that
way we can find the value
that will be in the middle
of the graph.
After finding the median,
the median divides the
data into two halves and
then to divide the data
into quarters the median
of the two halves must be
find.
Quartile 2
Quartile
Division
Quartile
Division
Quartile 3
Quartile 4
Quartile
Division
Ms. Rodriguez will use the Whisker
plot to determine the median
average her students obtain from
taking the tests. The whisker plot
summarizes the steps that need to be
taken in order to find an estimate
result.
 First, the numbers have to be
arrange from least to
greatest.
 Second, the numbers will be
plotted in a number line.
 Third, Ms. Rodriguez will
need to find the mean,
median, quartiles, and the
lowest and the upper
extremes, that way she can
determine an adequate
estimation of the scores her
students obtain.
 By gathering all the
information Ms. Rodriguez
can create a box whisker plot
to show her students scores.