STATISTICAL CALCULATIONS WITH A TI-83 PLUS/TI-84

©
(2/15/11) Frank Kizer

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© 2011 Frank Kizer

**
Purpose:**

Some teachers require that students do a lot of arithmetic is calculating values
such as the correlation coefficient and standard deviations in statistics. The
purpose of this document is to familiarize the reader with methods of using
lists to do arithmetic that will save many calculations when calculating such
values.

__
Entering Data:__
Press STAT, ENTER and the lists will be displayed.

__
Clearing a list:__** **
Move the cursor so that the name is highlighted and press CLEAR, then ENTER.
See Figure 1 below.

Figure 1: Clearing a list.

__
Entering
Data:__ Position
the cursor where you want to enter data, enter the number, and press ENTER.

__
Squaring the numbers in a list:__
Suppose we want to square the numbers in L

Figure 2. Storing squared L_{1} values
in L_{3}.

__
Next Square L _{2} and
store the results in L_{4}__:
Move the cursor to highlight the name of list L

__
__

Figure 3. Square y-values and store in L_{4}.

__
Multiplying two lists:__** **
Suppose we want to multiply two lists, for example “x” in L_{1} times y
in L_{2, }and store the results in L_{5}. Move the cursor so
that the name for L_{5} is highlighted. Press 2^{nd}, L_{1},x

(multiply sign),2^{nd}, L_{2}.
(See Figure 4 below.) Now press ENTER and the products will be stored in L_{5}

Figure 4: Multiplying L_{1} times L_{2}.

__
Getting the sum of a list:__
You must first get out of the list Edit function by pressing 2^{nd},
QUIT (the MODE key). The list menu will be displayed. Move the cursor over to
MATH (see figure 5 below) and press 5 to
paste “sum(“ to the home screen. (See Figure 6 below.) Now, press 2^{nd},
L_{1 }(the number 1 key), and ENTER. The sum will be displayed as in
Figure 6 below.

__
Figure 5: _{ }__
Display of list MATH
menu.

Figure
6: Display of sum(L_{1}.

__
Getting the sums of the remaining lists: __
You need not go through all
of the steps again. Merely press 2

Figure 6: Repeated summing of lists by re-displaying and editing a summation.

Released: 3/15/11

Last Revised: 3/15/11