Calculator User Manual
-3-
¦
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
N
40 Collège
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
-
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,
g
ive
n
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,
g
iven
n
and
r
. The order of objects is not
important, as in a hand of cards.
!
A
factorial
is the product of the positive inte
g
ers
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 inte
g
er (
seed value
)
‚
0 to
rand
. The
seed value
chan
g
es randoml
y
ever
y
time a random number is generated.
RAND
[
Generates a random inte
g
er between 2
inte
g
ers,
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
y
x
:
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.
EQU 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.
OP
— Pressing
m
or
o
when constants are not defined
or while in
STAT
mode.
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, 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
N
40 Collège
Ö
components while changing the battery.
4. If necessary, press
&
and
-
at the same time to reset
the
TI
N
40 Collège
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
N
40 Collège
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.
Note
:
Operates in well-lit areas using solar cell. Operates in
other light settings using battery.