Texas Instruments TI-82 STATS User manual

Getting Started
with the
TI-82 STATS

ii
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© 2003 Texas Instruments Incorporated
.

iii
Contents
About the TI-82 STATS....................................................................1
About this book ..............................................................................2
TI-82 STATS keys..............................................................................3
Turning the TI-82 STATS on and off...............................................4
Home screen....................................................................................5
yand ƒkeys.........................................................................7
‘and y5.........................................................................8
Entering an expression ...................................................................9
TI-82 STATS menus........................................................................10
Editing and deleting.....................................................................13
Using ¹and Ì.............................................................................15
Using parentheses.........................................................................17
Storing a value..............................................................................19
Graphing a function .....................................................................21
Changing mode settings...............................................................23
Setting the graphing window......................................................26
Using q....................................................................................28
Building a table.............................................................................29
Using the CATALOG......................................................................31
Performing simple calculations....................................................32
Using the equation solver ............................................................35
Entering data into lists .................................................................37
Plotting data .................................................................................39

iv
Calculating a linear regression.....................................................43
Calculating statistical variables ....................................................44
Using the MATRIX Editor..............................................................45
Error messages ..............................................................................49
Resetting defaults.........................................................................50
Connecting to a computer ...........................................................51
Quick reference.............................................................................51
Texas Instruments (TI) Support and Service.................................53
Battery precautions.......................................................................54

1
About the TI-82 STATS
The TI-82 STATS includes these features:
•Graphing - store, graph, and analyze up to 10 functions,
up to 6 parametric functions, up to 6 polar functions, and
up to three sequences.
•Sequences - generate sequences and graph them over
time.
•Tables - create function evaluation tables to analyze many
functions simultaneously.
•Matrices - enter and save up to 10 matrices and perform
standard matrix operations on them.
•Lists - enter and save as many lists as memory allows for
use in statistical analyses.
•Statistics - perform one- and two-variable, list-based
statistical analyses, including logistic and sine regression
analysis; plot the data as a histogram, xyLine, scatter plot,
modified or regular box-and-whisker plot, or normal
probability plot.
The CD included with your TI-82 STATS package also includes an
electronic guidebook, which is a complete reference manual for
the TI-82 STATS. If the CD is not available, you can download a
copy of the electronic guidebook from the Texas Instruments web
page at
education.ti.com/guides

2
About this book
This Getting Started Guide was designed for:
•students who are using a graphing calculator for the first
time.
•student who are using the TI-82 STATS for the first time.
•students who need a quick review of procedures for
common operations on the TI-82 STATS.
This book gives a quick overview of each topic, along with
keystroke instructions for easy examples. All examples assume
that the TI-82 STATS is using default settings. For complete
information on any topic, see the electronic guidebook on the CD
that came with your TI-82 STATS.
Look for the symbol at the top of the page in this guide.
These notes direct you to the chapter in the Guidebook that
provides complete details about the topic.

3
TI-82 STATS keys
}~†|
Let you move
the cursor in
four directions.
‘
Clears (erases)
the entry line
or deletes an
entry and
answer on the
home screen.
Í
Evaluates an
expression,
executes an
instruction, or
selects a menu
item.
É
Turns on the
TI-82 STATS.
y
Provides access
to the function
or character
shown above
each key in
g
reen.
ƒ
Provides access
to the
characters
shown above
each key in
orange.

4
Turning the TI-82 STATS on and off
To turn on the TI-82 STATS, press É. The É
key is located at the lower left corner of the
TI-82 STATS.
To turn off the TI-82 STATS, press the ykey
followed by the Ékey. OFF is the second function of É.
When you turn off the TI-82 STATS, all settings and memory
contents are retained. The next time you turn on the TI-82 STATS,
the home screen displays as it was when you last used it.
Automatic Power Down™
To prolong the life of the batteries, Automatic Power Down™
(APD™) turns off the TI-82 STATS automatically after about five
minutes without any activity. The next time you turn on the
calculator, it is exactly as you left it.

For more details,
see Guidebook
Chapter 1.

5
Home screen
When you turn on your TI-82 STATS the first time, you should see
this screen:
If you cannot read the text on the screen, press the ykey and
then press and hold †or }. Pressing †lightens the screen and
}darkens the screen.
To clear this text from your screen, press ‘twice. You should
now see the home screen, a blank screen with a flashing cursor.
The home screen is where you enter problems and see results.
If you pressed ‘above and you still do not see a blank home
screen, press the ykey followed by the zkey (to select
QUIT).

6
Home screen (continued)
Example: Add 2 + 3 on the home screen.
Press Result
2Ã3
Í
Note: Results are displayed on the next line (the answer line), not on the
entry line.
Example: Multiply 5 x 4.
Press Result
5¯4
Í
Entry line
Answer
line

7
yand ƒkeys
Most keys on the TI-82 STATS can perform two or more functions.
To use a function printed on a key, press the key. To use a
function printed above a key in green or orange, you must first
press the ykey or the ƒkey.
ykey
Second functions are printed above the keys in green (the same
color as the ykey). Some secondary functions enter a function
or a symbol on the home screen (sin-1 or ‡, for example). Others
display menus or editors.
To view the ANGLE menu, for example, look for ANGLE (printed
in green) above the key near the top of the TI-82 STATS
keyboard. Press the ykey (and then release it) and then press
. In this book and in the TI-82 STATS Guidebook, this key
combination is indicated by y;, not y. When you
see these key combinations, press each key separately, not at the
same time.
Note: The flashing cursor changes to Þ when you press the y key. If
you press the
y key accidentally, you can undo the action by
pressing
y a second time.
ƒkey
The ƒkey lets you enter the alphabetic characters and some
special symbols. To enter T, for example, press ƒ(and then
release it) and then press ¶. In this book and in the TI-82 STATS
Guidebook, this key combination is indicated by ƒ[ T].
If you have several alphabetic characters to enter, press
y7to avoid having to press the ƒkey multiple times.
This locks the alpha key in the On position until you press ƒa
second time to unlock it.
Note: The flashing cursor changes to Ø when you press the ƒ key.
If you press the
ƒ key accidentally, you can undo the action by
pressing
ƒ a second time.

8
‘and y5
‘key
The ‘key erases the home screen. This key is located just
below the four blue arrow keys at the upper right corner of the
TI-82 STATS keyboard. If you press ‘during an entry, it clears
the entry line. If you press ‘when the cursor is on a blank
line, it clears everything on the home screen.
Although it does not affect the calculation, it is frequently
helpful to clear the previous work from the home screen before
you begin a new problem. As you work through this guide, we
recommend that you press ‘each time you begin a new
Example.This removes the previous example from the home
screen and ensures that the screen you see matches the one
shown in the example.
y5
If you accidentally press a menu key, pressing ‘will
sometimes return you to the home screen, but in most cases you
must press y5to leave the menu and return to the home
screen.

9
Entering an expression
An expression consists of numbers, variables, operators, functions,
and their arguments that evaluate to a single answer. 2X + 2 is an
expression.
Type the expression, and then press Íto evaluate it. To enter
a function or instruction on the entry line, you can:
•Press its key, if available. For example, press «.
— or —
•Select it from the CATALOG. For example, press y
N, press †to move down to log(, and press Íto
select log(.
— or —
•Select it from a menu, if available. For example, to find
the round function, press , press ~to select NUM,
then select 2:round(.
Example: Enter and evaluate the expression pQ2.
Press Result
yB¯2
Í

10
TI-82 STATS menus
Many functions and instructions are entered on
the home screen by selecting from a menu.
To select an item from the displayed menu:
•Press the number or letter shown at the left of that item.
— or —
•Use the cursor arrow keys, †or }, to highlight the item,
and then press Í.
Some menus close automatically when you make a selection, but
if the menu remains open, press y5to exit. Do not press
‘to exit, since this will sometimes delete your selection.
Example: Enter
327 on the home screen entry line.
Press Result

4
— or —
†††Í
27¤
Í
Menus
containing an
arrow next to
the final item
continue on a
second page.

For more details,
see Guidebook
Chapter 1.

11
TI-82 STATS menus (continued)
Example: Change the FORMAT menu setting to display grid
points on the graph.
Press Result
y.
††~
Í
s
Example: Turn off the display of grid points.
y.††
Í
Note: Press y5 or ‘ to close the FORMAT menu and return
to the home screen.

12
TI-82 STATS menus (continued)
Summary of menus on the TI-82 STATS
Press To display
y8LINK menu — to communicate with another
calculator.
yLMEMORY menu — to check available memory and
manage existing memory.
MATH menu — to select a math operation.
VARS menu — to select variable names to paste to
the home screen.
y,STAT PLOTS menu — to define statistical plots.
yNCATALOG menu — to select from a complete,
alphabetic list of all TI-82 STATS built-in functions
and instructions.
y.FORMAT menu — to define a graph’s appearance.
y>MATRIX menu — to define, view, and edit
matrices.
y<DRAW menu — to select tools for drawing on
graphs.
y=DISTRIBUTIONS menu — to select distribution
functions to paste to the home screen or editor
screens.
y:TEST menu — to select relational operators
(=, ƒ, {, |, etc.) and Boolean operators (and, or,
xor, not) to paste to the home screen.

13
Editing and deleting
You can change any expression or entry using the backspace |
key, the delete {key, or the insert y6key. You can make a
change before or after you press Í.
Example: Enter the expression 52+ 1, and then change the
expression to 52+ 5.
Press Result
5¡Ã1
|5
Example: Enter the expression 52+ 1, and then change the
expression to 52- 5.
Press Result
5¡Ã1

14
Editing and deleting (continued)
Press Result
||{{
¹5
Í
Example: Change the example above to 52+ 2 - 5 using
y[to recall the expression and y6to
insert + 2 into the expression.
Press Result
y[
||y6
Ã2
Í

15
Using ¹and Ì
Many calculators (including the TI-82 STATS) make a distinction
between the symbols for subtraction and negation.
Use ¹to enter subtraction operations. Use Ìto enter a negative
number in an operation, in an expression, or on a setup screen.
Example: Subtract 10 from 25.
Press Result
25¹1 0
Í
Example: Add 10 to L25.
Press Result
Ì25Ã1 0
Í

16
Using ¹and Ì(continued)
Example: Subtract L10 from 25.
Press Result
2 5 ¹Ì1 0
Í
Note: Notice that the TI-82 STATS displays a slightly different symbol for
negation and subtraction to make it easier for you to distinguish
between the two. The negative symbol is raised and slightly shorter.