#### 12.3 Box-and-Whisker Plots

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12.3 Box-and-Whisker Plots

12.3
Box-and-Whisker Plots
Objectives: Find the range, quartiles, and
interquartile range for a data set. Make a box
and-whisker plot for a data set.
Standards: 2.6.8E Analyze and display data in boxand-whisker plots.
*Ex 2. The data at the right shows the age of 43 Florida
Marlins
baseball players at the
1997 Worlds Series.
a). Find the quartiles, range, and interquartile range
for the data.
b). Identify any outliers.
*Ex. 3 Find the minimum and maximum values,
quartiles, range, and interquartile
range for the set of data below.
Identify any possible outliers.
4, 7, 9, 31, 34, 2, 35, 37, 24, 34, 31, 50,
11, 33, 36, 2, 8, 13, 52, 57,60, 69, 78, 83
Making a Box-and-Whisker on a Piece of Paper:
Making a Box-and-Whisker Plot with your Graphing Calculator:
STAT, EDIT, L1 (enter your given values), 2nd STAT PLOT,
HIGHLIGHT ON &
then hit ENTER, HIGHLIGHT the box-and whisker plot & then
hit ENTER, X LIST make sure it has L1 , FREQ: 1, then
GRAPH.
If you can not see your Box-and-Whisker Plot, then adjust your
WINDOWS accordingly!!
If you are comparing 2 Box-and-Whisker Plots, you will need to
use L2 and you will need to turn on another STAT PLOT!!
* Ex 2 Refer to the precipitation data below.
a). Make a box-and-whisker plot for the amount of
precipitation in each city.
b). Compare the box-and-whisker plots.
Writing Activities
PSSA WARM-UP QUESTION
Algebra II - Chp. 12
Standard 2.6.11 A Complete statistical experiments.
The final grades in mathematics of 35 students at Souderton High
School are shown at the right. Organize the data in a table
(interval, tally, frequency) and display it in a histogram.
82
88
82
75
93
86
98
97
87
65
97
82
74
89
86
84
94
72
93
76
83
68
71
94
77
77
62
90
Standard 2.6.11 I Use the normal
curve.
The grades on Mr. Simpson’s Algebra II final
exam had a normal distribution with a mean
score of 85, and a standard deviation of 3
points. A student earned a B+ or better if he
scored 88 or greater. How can Mr. Simpson
use the properties of the normal curve and the
statistics mean and standard deviation to find
the portion of the class earning a B+ or better?
Review of
Box-and-Whisker Plots