© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI
-
34
Û
: A Guide for Teachers
A-5
Quick Reference to Keys
(Continued)
A
Key
Function
}
Simplifies a fraction.
%
t
Displays the following menu from which you can select
1-VAR,
2-VAR
, or
CLRDATA
.
1-VAR
Analyzes data from 1 set of data with 1 measured
variable—
x.
2-VAR
A
nalyzes paired data from 2 sets of data with 2
measured variables—
x, the independent variable,
and
y, the dependent variable.
CLRDATA
Clears data values without exiting
STAT
mode.
u
Displays the following menu of stat variables with their current values.
n
Number of x (or x,y) data points
v
or
w
Mean of all x or y values
Sx or Sy
Sample standard deviation of x or y
s
x or
s
y
Population standard deviation of x or y
G
x or
G
y
Sum of all x values or y values
G
x
2
or
G
y
2
Sum of all x
2
values or y
2
values
G
xy
Sum of (x x y) for all xy pairs in 2 lists
a
Linear regression slope
b
Linear regression y-intercept
r
Correlation coefficient
The following variables are used to calculate predicted values based on
the correlation when a given value is input.
x
¢
or y
¢
Calculates the predicted value of x or y, respectively,
when given value of y or x, respectively, is input.
L
Displays the following menu of variables.
A B C D E
Lets you select a variable in which to store the
displayed value. The new variable replaces any
previously stored value.
rand
Lets you set a seed value for random integers.
