Texas Instruments TI-30X Function Guide - Page 2

ENG

30X

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Page 2

Statistics

%tw

v

u

1-VAR

analyzes statistical data from 1 data set with 1

measured variable,

x

.

2-VAR

stats analyzes paired data

from 2 data sets with 2 measured variables—

x

, the

independent variable, and

y

, the dependent variable. You

can enter up to 42 data sets.

To define statistical data points:

1. Press

%

t

. Select

1-VAR

or

2-VAR

and press

<

. The

STAT

indicator displays.

2. Press

v

.

3. Enter a value for

X

1

.

4. Press

$

.

¦

In

1-VAR

stat mode, enter the frequency of occurrence

(

FRQ

) of the data point.

FRQ

default=1. If

FRQ

=0, the

data point is ignored.

¦

In

2-VAR

stat mode, enter the value for

Y

1

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

FRQ

value entered. If you add or delete data points,

the TI-30X

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).

Variables

Definition

n

Number of

x

or (

x

,

y)

data points.

Ï

or

Ð

Mean of all

x

or

y

values.

Sx

or

Sy

Sample standard deviation of

x

or

y

.

Î

x

or

Î

y

Population standard deviation of

x

or

y

.

Ò

x

or

Ò

y

Sum of all

x

or

y

values.

Ò

x

2

or

Ò

y

2

Sum of all

x

2

or

y

2

values.

Ò

xy

Sum of (

x

…

y)

for all

xy

pairs.

a

Linear regression slope.

b

Linear regression

y

-intercept.

r

Correlation coefficient.

x

¢

(

2-VAR

)

Uses

a

and

b

to calculate predicted

x

value

when you input a

y

value.

y

¢

(

2-VAR

)

Uses

a

and

b

to calculate predicted

y

value

when you input an

x

value.

Probability

H

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,

A

and

B,

where

A

{

RAND

[

{

B

. 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 x

‡

:

x = 0 or y < 0 and x not an odd integer.

¦

For yx:

y and x = 0; y < 0 and x not an integer.

¦

For

‡

x:

x < 0.

¦

For LOG or LN:

x

±

0.

¦

For TAN:

x = 90

¡

, -90

¡

, 270

¡

, -270

¡

, 450

¡

, etc.

¦

For SIN

-

1 or COS

-

1:

|x| > 1.

¦

For nCr or nPr: n or r are not integers

‚

0.

¦

For x!:

x is not an integer between 0 and 69.

EQUATION 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.

FRQ DOMAIN

—

FRQ

value (in

1-VAR

stats) < 0 or >99, or

not an integer.

OVERFLOW

— |

q

|

‚

1

¯

10, where

q

is an angle in a trig,

hyperbolic, or

R

4

Pr(

function.

STAT

—

¦

Pressing

u

with no defined data points.

¦

When not in STAT mode, pressing

v

,

u

, or

%

w

.

SYNTAX

— The command contains a syntax error: entering

more than 23 pending operations or 8 pending values; or

having misplaced functions, arguments, parentheses, or

commas.

Battery Replacement

1. Using a small Phillips screwdriver, remove screws from

back case.

2. Remove protective cover. 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-30X

Ö

components

while changing the battery.

4. If necessary, press

&

and

-

at the same time to

reset the TI-30X

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

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-30X

×

S (Battery/Solar)

†

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.

TI Product Service and Warranty Information

Product Support

Customers in the U.S., Canada, Puerto Rico, and the Virgin

Islands

For general questions, contact Texas Instruments Customer

Support:

phone:

1

.

800

.

TI

.

CARES

(1

.

800

.

842

.

2737)

e-mail:

[email protected]

For technical questions, call the Programming Assistance Group of

Customer Support:

phone:

1

.

972

.

917

.

8324

Customers outside the U.S., Canada, Puerto Rico, and the

Virgin Islands

Contact TI by e-mail or visit the TI calculator home page on the

World Wide Web.

e-mail:

[email protected]

Internet:

www.ti.com/

calc

Product Service

Customers in the U.S. and Canada Only

Always contact Texas Instruments Customer Support before

returning a product for service.

Customers outside the U.S. and Canada

Refer to the leaflet enclosed with this product or contact your local

Texas Instruments retailer/distributor.

Other TI Products and Services

Visit the TI calculator home page on the World Wide Web.

www.ti.com/calc

Warranty Information

Customers in the U.S. and Canada Only

One-Year Limited Warranty for Electronic Product

This Texas Instruments (“TI”) electronic product warranty extends

only to the original purchaser and user of the product.

Warranty Duration.

This TI electronic product is warranted to the

original purchaser for a period of one (1) year from the original

purchase date.

Warranty Coverage.

This TI electronic product is warranted against

defective materials and construction.

THIS WARRANTY IS VOID IF

THE PRODUCT HAS BEEN DAMAGED BY ACCIDENT OR

UNREASONABLE USE, NEGLECT, IMPROPER SERVICE, OR

OTHER CAUSES NOT ARISING OUT OF DEFECTS IN

MATERIALS OR CONSTRUCTION.

Warranty Disclaimers. ANY IMPLIED WARRANTIES ARISING

OUT OF THIS SALE, INCLUDING BUT NOT LIMITED TO THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION

TO THE ABOVE ONE-YEAR PERIOD. TEXAS INSTRUMENTS

SHALL NOT BE LIABLE FOR LOSS OF USE OF THE PRODUCT

OR OTHER INCIDENTAL OR CONSEQUENTIAL COSTS,

EXPENSES, OR DAMAGES INCURRED BY THE CONSUMER OR

ANY OTHER USER.

Some states/provinces do not allow the exclusion or limitation of

implied warranties or consequential damages, so the above

limitations or exclusions may not apply to you.

Legal Remedies.

This warranty gives you specific legal rights, and

you may also have other rights that vary from state to state or

province to province.

Warranty Performance.

During the above one (1) year warranty

period, your defective product will be either repaired or replaced

with a reconditioned model of an equivalent quality (at TI’s option)

when the product is returned, postage prepaid, to Texas

Instruments Service Facility. The warranty of the repaired or

replacement unit will continue for the warranty of the original unit or

six (6) months, whichever is longer. Other than the postage

requirement, no charge will be made for such repair and/or

replacement. TI strongly recommends that you insure the product

for value prior to mailing.

Software.

Software is licensed, not sold. TI and its licensors do not

warrant that the software will be free from errors or meet your

specific requirements.

All software is provided “AS IS.”

Copyright.

The software and any documentation supplied with this

product are protected by copyright.

All Customers Outside the U.S. and Canada

For information about the length and terms of the warranty, refer to

your package and/or to the warranty statement enclosed with this

product, or contact your local Texas Instruments retailer/distributor.

Texas Instruments TI-30X Function Guide - Page 2

Statistics, Probability, Errors, Battery Replacement, In Case of Difficulty, TI Product Service - calculator functions

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