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11.1 Making a Histogram
GRAPHING
CALCULATOR
Goal Use a graphing calculator to make a histogram.
Example
Use a graphing calculator to make a histogram of the following data.
The average precipitation (in inches) for each month in
Juneau, Alaska, is given below.
4.54, 3.75, 3.28, 2.77, 3.42, 3.15, 4.16, 5.32, 6.73, 7.84, 4.91, 4.44
1
Press
into list L1.
L1
L2
4.54
3.75
3.28
2.77
3.42
3.15
L1(4)=2.77
Tech Help
You do not need to
change the value of ∆X
in the WINDOW
settings.
Online Resources
CLASSZONE.COM
• Keystroke Help
3
. Enter the data
2
L3
[PLOT]. Select Plot1
Press
and choose the histogram
from the menu. Set the value
for Xlist to L1.
Plot1 On Off
Type:
Xlist:L1
Freq:1
Press
. Set Xmin and
Xmax to include all the data
values. Use Xscl to set the width
of the bars. Set Ymin and Ymax
so that the tops and bottoms of
the bars can be viewed.
4
Press
to graph the
data. Press
and the
left and right arrow keys to
move from bar to bar and
examine the histogram.
WINDOW
Xmin=2
Xmax=8
X=.0638297872...
Xscl=1
Ymin=0
Ymax=7
Yscl=1
Draw Conclusions
1. Use a graphing calculator to make a histogram of the following
test scores: 67, 68, 75, 73, 82, 96, 71, 73, 89, 84, 82, 91, 85, 88, 94.
2. Analyze Interpret the histogram in the example above. Are the
data bunched together or spread out? Would you say that the
average monthly precipitation is less than or greater than
5 inches? Explain.
Lesson 11.1
Stem-and-Leaf Plots and Histograms
587