Texas Instruments TI-34 II Explorer Plus User Manual page 2

Stored Operations m m o o %
The TI-34 Ö stores two operations,
OP1
an operation to or and recall it:
OP1 OP2
1. Press % n or % p.
2. Enter the operation (any combination of numbers,
operators, or menu items and their arguments).
3. Press < to save the operation to memory.
4. m or o recalls and displays the operation on the
entry line. The TI-34 Ö automatically calculates the
result (without pressing <) and displays the counter
(as space permits) on the left side of the result line.
34 Ö to display only the counter and
You can set the TI -
the result (excluding the entry). Press % n or
% p, press ! until the = is highlighted (Ù) and
press <. Repeat to toggle this setting off.
z z L L % % h
Memory
The TI-34 Ö has 5 memory variables—
You can store a real number or an expression that results
in a real number to a memory variable.
¦ z accesses the menu of variables.
¦ L lets you store values to variables.
¦ % h recalls the values of variables.
¦ % { clears all variable values.
Notation
% ‚ displays the decimal notation mode menu.
These settings only affect the display of results.
restores Floating-decimal format. Set decimal places to n
(0–9) with
0123456789.
C enters a value in scientific notation. Press M before
entering a negative exponent.
US 34IIàOMà1L1àA
% n n p p Stats
and . To store stats analyzes data from 1 data set with 1 measured
OP2 1-VAR
variable,
X
sets with 2 measured variables—
variable, and
to 42 data sets.
Steps for defining statistical data points:
1. Press % t. Select
The
STAT
2. Press v.
3. Enter a value for
4. Then:
¦ In 1-VAR stat mode, enter the frequency of occurrence
(FRQ) of the data point and press $. FRQ default=1. If
FRQ=0, the data point is ignored. Or
¦ In 2-VAR stat mode, enter the value for Y 1 and press $.
h { {
5. Repeat steps 3 and 4 until all data points are entered.
You must press < or $ to save the last data point
, , , , and .
A B C D E
or
FRQ
the TI-34 Ö automatically reorders the list.
6. When all points and frequencies are entered:
¦ Press u to display the menu of variables (see
table for definitions) and their current values, or
¦ Press v to return to the blank STAT screen. You can
do calculations with data variables (Ï, Ð, etc.). Select a
variable from the u menu and then press < to
evaluate the calculation.
% % ‚ ‚ C C
7. When finished:
¦ Press % t and select CLRDATA to clear all data
(default)
points without exiting STAT mode, or
F
¦ Press % w < to clear all data points,
variable and FRQ values, and to exit STAT mode (STAT
indicator turns off).
Variables
n
Ï or Ð
Sx or Sy
Îx or Îy
Òx or Òy
Òx 2 or Òy
Òxy
a
b
r
' (
X 2-VAR
' (
Y 2-VAR
Probability
nPr
nCr
!
RAND
RAND[
% % t t w w v v u u
. stats analyzes paired data from 2 data
2-VAR
, the independent
X
, the dependent variable. You can enter up
Y
or
1-VAR 2-VAR and press <
indicator displays.
and press $.
X
1
value entered. If you add or delete data points,
Definition
Number of or ( ) data points.
X X,Y
Mean of all or values.
X Y
Sample standard deviation of or
X
Population standard deviation of
X
Sum of all or values.
X Y
2 2 2
Sum of all or values.
X Y
...
Sum of for all pairs.
X Y XY
Linear regression slope.
Linear regression -intercept.
Y
Correlation coefficient.
) Uses a and b to calculate predicted X value
when you input a Y value.
) Uses a and b to calculate predicted Y value
when you input an X value.
Calculates the number of possible permutations
of n items taken r at a time, given n and r. The
order of objects is important, as in a race.
Calculates the number of possible
combinations of n items taken r at a time, given
n and r. The order of objects is not important, as
in a hand of cards.
A factorial is the product of the positive integers
from 1 to n. n must be a positive whole number
 69.
Generates a random real number between 0 and
1. To control a sequence of random numbers,
store an integer ( seed value ) ‚ 0 to rand. The
seed value changes randomly every time a
random number is generated.
Generates a random integer between 2 integers,
A and B, where A { { B . Separate the 2
RAND[
integers with a comma.
Errors
— A function does not have the correct number
ARGUMENT
of arguments.
—
DIVIDE BY 0
You attempted to divide by 0.
¦
In statistics, n=1.
¦
— You specified an argument to a function outside
DOMAIN
the valid range. For example:
.
¦ For x ‡: x = 0 or y < 0 and x not an odd integer.
x
¦ For y : y and x = 0; y < 0 and x not an integer.
¦ For ‡ x : x < 0.
¦ For x  0.
or
:
LOG LN
¦ For x = 90¡, -90¡, 270¡, -270¡, 450¡, etc.
:
TAN
¦ For -1 or -1 | x | > 1.
:
SIN COS
¦ For n or r are not integers ‚ 0.
or
nCr nPr:
¦ For x !: x is not an integer between 0 and 69.
— An entry exceeds the digit limits (88
EQ LENGTH ERROR
for Entry Line and 47 for Stat or Constant Entry lines); for
example, combining an entry with a constant that exceeds
the limit.
— Pressing } when
FRACMODE
— value (in
FRQ DOMAIN
FRQ
an integer.
— Pressing m or o when constants not defined or
OP
while in mode.
STAT
— |q| ‚ 1¯10, where q is an angle in a
OVERFLOW
trigonometric, hyperbolic, or
—
STAT
¦ Pressing u with no defined data points.
¦ When not in STAT mode, pressing v, u, or
% w.
— The command contains a syntax error: entering
SYNTAX
more than 23 pending operations, 8 pending values, or
having misplaced functions, arguments, parentheses, or
commas.
Battery Replacement
Replace protective cover. Place the TI-34 Ö face down.
1. Using a small Phillips screwdriver, remove screws from
. back case.
Y
or .
Y 2. Starting from the bottom, carefully separate front from
back. Caution: Be careful not to damage any internal
parts.
3. Using a small Phillips screwdriver, if necessary, remove
old battery; replace with new one.
Caution: Avoid contact with other TI-34 Ö components
while changing the battery.
4. If necessary, press & and - at the same time to
reset the TI-34 Ö (clears memory and all settings).
Caution: Dispose of old batteries properly. Do not
incinerate batteries or leave where a child can find them.
In Case of Difficulty
H H
Review instructions to be certain calculations were
performed properly.
Press & and - at the same time. This clears all
memory and settings.
Check the battery to ensure that it is fresh and properly
installed.
Change the battery when:
¦ & does not turn the unit on, or
¦ The screen goes blank, or
¦ You get unexpected results.
To continue using the TI-34 Ö † until you can change the
battery:
1. Expose the solar panel to brighter light.
2. Press & and - at the same time to reset the
calculator. This clears all settings and memory.
† Operates in well-lit areas using solar cell. Operates in
other light settings using battery.
= .
Fracmode Auto
stats) < 0 or >99, or not
1-VAR
function.
R4Pr(
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