TI -34 ii explorer plus Quick Reference Card

US     34II

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Page 2

m

m

o

o

%

%

n

n

p

p

The TI

-

34 

Ö

 stores two operations, 

 and 

. To store

an operation to 

 or 

and recall it:

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

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34 

Ö

 automatically calculates the

result (without pressing 

<

) and displays the counter

(as space permits) on the left side of the result line.

You can set the TI

-

34 

Ö

 to display only the counter and

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

h{

{

The TI

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34 

Ö

 has 5 memory variables—

, 

, 

, 

, and 

.

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.

%

%

‚

‚

C

C

%

 

‚

 displays the decimal notation mode menu.

These settings 

only

 affect the display of results. 

 (default)

restores Floating-decimal format. Set decimal places to 

n

(0–9) with 

C

 enters a value in scientific notation. Press 

M

 before

entering a negative exponent.

%

%t

t

w

w

v

v

u

u

stats analyzes data from 1 data set with 1 measured

variable, 

. 

stats analyzes paired data from 2 data

sets with 2 measured variables—

, the independent

variable, and 

, the dependent variable. You can enter up

to 42 data sets.

Steps for defining statistical data points:

1. Press 

%

 

t

. Select 

 or 

2-VAR and press 

<

.

The 

 indicator displays.

2. Press 

v

.

3. Enter a value for 

 and press 

$

.

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 Y1 and press 

$

.

5. Repeat steps 3 and 4 until all data points are entered.

You must press 

<

 or 

$

 to save the last data point

or 

 value entered. If you add or delete data points,

the TI

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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.

7. When finished:

¦ 

Press 

%

 

t

 and select CLRDATA to clear all data

points 

without exiting STAT mode, or

¦ 

Press 

%

 

w

 

<

 to clear all data points,

variable and FRQ values, and to exit STAT mode (STAT
indicator turns off).

Number of 

 or (

) data points.

Ï

 or 

Ð

Mean of all 

 or 

 values.

Sx or Sy

Sample standard deviation of 

 or 

.

Î

x or 

Î

Population standard deviation of 

 or 

.

Ò

x or 

Ò

Sum of all 

 or 

 values.

Ò

 or 

Ò

Sum of all 

 or 

 values.

Ò

Sum of 

…

 for all 

 pairs.

Linear regression slope.

Linear regression 

-intercept.

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.

H

H

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

integers with a comma.

 — A function does not have the correct number

of arguments.

 — 

¦ 

You attempted to divide by 0.

¦ 

In statistics, n=1.

 — You specified an argument to a function outside

the valid range. For example:

¦ 

For 

x

‡

: 

x 

= 0 or 

y 

< 0 and 

 

not an odd integer.

¦ 

For 

y

x

: 

y

 and 

x 

= 0; 

y 

< 0 and 

x 

not an integer.

¦ 

For 

‡

x

: 

x 

< 0.

¦ 

For

 

 

or

 

:

 

x

  



  0.

¦ 

For

 

: 

x

= 90

¡

, -90

¡

, 270

¡

, -270

¡

, 450

¡

, etc.

¦ 

For

 

 

or

 

:  

|

x

| > 1.

¦ 

For

 nCr 

or

 nPr: 

n or r are not integers 

‚

 0.

¦ 

For 

x

!:  

 is not an integer between 0 and 69.

— An entry exceeds the digit limits (88

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 

=

.

 — 

 value (in 

 stats) < 0 or >99, or not

an integer.

 — Pressing 

m

 or 

o

 when constants not defined or

while in 

 mode.

 — |

q

| 

‚

 1

¯

10, where 

q

 

is an angle in a

trigonometric, hyperbolic, or 

4

 function.

 — 

¦ 

Pressing 

u

 with no defined data points.

¦ 

When not in STAT mode, pressing 

v

, 

u

, or

%

 

w

.

 — The command contains a syntax error: entering

more than 23 pending operations, 8 pending values, or
having misplaced functions, arguments, parentheses, or
commas.

Replace protective cover. Place the TI

-

34 

Ö

 face down.

1. Using a small Phillips screwdriver, remove screws from

back case.

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.

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.