Handleiding Texas Instruments ti 34 ii explorer plus (pagina 2 van 4) (Engels)

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Stored Operations

The TI

stores two operations,

OP1

and

OP2

. To store

an operation to

OP1

OP2

and recall it:

1. Press

2. Enter the operation (any combination of numbers,

operators, or menu items and their arguments).

3. Press

to save the operation to memory.

recalls and displays the operation on the

entry line. The TI

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

to display only the counter and

the result (excluding the entry). Press

, press

until the = is highlighted (

) and

press

. Repeat to toggle this setting off.

Memory

hh{{

The TI

has 5 memory variables—

, and

You can store a real number or an expression that results

in a real number to a memory variable.

accesses the menu of variables.

lets you store values to variables.

recalls the values of variables.

{

clears all variable values.

Notation

‚‚

‚

displays the decimal notation mode menu.

These settings

only

affect the display of results.

(default)

restores Floating-decimal format. Set decimal places to

(0–9) with

0123456789.

enters a value in scientific notation. Press

before

entering a negative exponent.

Stats

%%tt

1-VAR

stats analyzes data from 1 data set with 1 measured

variable,

2-VAR

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

. Select

1-VAR

2-VAR

and press

The

STAT

indicator displays.

2. Press

3. Enter a value for

and press

4. Then:

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

2-VAR

stat mode, enter the value for

and press

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

You must press

to save the last data point

FRQ

value entered. If you add or delete data points,

the TI

automatically reorders the list.

6. When all points and frequencies are entered:

Press

to display the menu of variables (see

table for definitions) and their current values, or

Press

to return to the blank

STAT

screen. You can

do calculations with data variables (

, etc.). Select a

variable from the

menu and then press

evaluate the calculation.

7. When finished:

Press

and select

CLRDATA

to clear all data

points

without

exiting

STAT

mode, or

Press

to clear all data points,

variable and

FRQ

values, and to exit

STAT

mode (

STAT

indicator turns off).

Variables Definition

n Number of

or (

X,Y

) data points.

Mean of all

values.

Sx or Sy Sample standard deviation of

x or

y Population standard deviation of

x or

y Sum of all

values.

Sum of all

values.

xy Sum of

…

for all

pairs.

a Linear regression slope.

b Linear regression

-intercept.

r Correlation coefficient.

' (

2-VAR

) Uses a and b to calculate predicted X value

when you input a Y value.

' (

2-VAR

) Uses a and b to calculate predicted Y value

when you input an X value.

Probability

nPr

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.

nCr

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.

RAND

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.

RAND

[

Generates a random integer between 2 integers,

and

where

{

RAND

[

{

. Separate the 2

integers with a comma.

Errors

ARGUMENT

— A function does not have the correct number

of arguments.

DIVIDE BY 0

—

You attempted to divide by 0.

In statistics, n=1.

DOMAIN

— You specified an argument to a function outside

the valid range. For example:

For

‡

= 0 or

< 0 and

not an odd integer.

For

and

= 0;

< 0 and

not an integer.

For

‡

< 0.

For

LOG



For

TAN

= 90

, -90

, 270

, -270

, 450

, etc.

For

SIN

COS

| > 1.

For

nCr

nPr

n or r are not integers

‚

For

is not an integer between 0 and 69.

EQ LENGTH ERROR

— 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.

FRACMODE

— Pressing

}

when

Fracmode

Auto

FRQ DOMAIN

—

FRQ

value (in

1-VAR

stats) < 0 or >99, or not

an integer.

— Pressing

when constants not defined or

while in

STAT

mode.

OVERFLOW

— |

‚

10, where

is an angle in a

trigonometric, hyperbolic, or

Pr(

function.

STAT

—

Pressing

with no defined data points.

When not in STAT mode, pressing

, or

SYNTAX

— The command contains a syntax error: entering

more than 23 pending operations, 8 pending values, or

having misplaced functions, arguments, parentheses, or

commas.

Battery Replacement

Replace protective cover. Place the TI

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

components

while changing the battery.

4. If necessary, press

and

at the same time to

reset the TI

(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

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

†

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.

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