User manual

© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
A-5
Quick Reference to Keys
(Continued)
A
K
EY
F
UNCTION
>
Calculates the sine.
% Z
Calculates the inverse sine.
% 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
Analyzes 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
Q
y) for all xy pairs in 2 lists.
a
Linear regression slope.
b
Linear regression y-intercept.
r
Correlation coefficient.
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.
@
Calculates the tangent.
% \
Calculates the inverse tangent.