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Note 1C • Median and Mean (continued)
Use the down arrow to display the entire list of values.
the mean
x
416.875
the sum of the x-values
x
3335
2
the sum of the squares of the x-values
x
1414425
the sample standard deviation
Sx
58.73290025
the population standard deviation
x
54.93959751
the number of data values
n
8
the minimum data value
minX
320
the first quartile
Q1
375
the median
Med
425
the third quartile
Q3
467.5
the maximum data value
maxX
480
Errors
If you select
and forget to enter the list name, the calculator default
1–Var Stats
will be list
. If you get
L
ERR:INVALID DIM
1
Note 1D • Box Plots
Entering the Data
Enter the data set into a list. List
need help entering data.)
Setting the
Values
WINDOW
Press
and enter the following values into the
WINDOW
a number slightly less than the minimum of the data.
Xmin
a number slightly greater than the maximum of the data.
Xmax
the distance between tick marks. Although this number is not
Xscl
critical to graphing a box plot, if it's too small, the tick marks will
make the x-axis appear too thick.
0.
Ymin
10. This number is not important for a box plot. Any number
Ymax
greater than Ymin will work.
0. This number does not affect a box plot.
Yscl
1. This number does not affect a box plot.
Xres
12
Discovering Algebra Calculator Notes for the Texas Instruments TI-83 and TI-83/84 Plus
, you have selected a blank list.
is used for this example. (See Note 1B if you
L
1
WINDOW
TI-83 and TI-83/84 Plus
screen.
(continued)
©2007 Key Curriculum Press
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