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Quick Reference to Keys
K
F
EY
>
Calculates the sine.
% Z
Calculates the inverse sine.
% t
Displays the following menu from which you can select 1-VAR, 2-VAR, or
CLRDATA.
u
Displays the following menu of stat variables with their current values.
L
Displays the following menu of variables.
@
Calculates the tangent.
% \
Calculates the inverse tangent.
© 1999 T
I
I
EXAS
NSTRUMENTS
NCORPORATED
UNCTION
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.
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.
sx or sy
Population standard deviation of x or y.
Gx or Gy
Sum of all x values or y values.
2
2
Gx
or Gy
Sum of all x 2 values or y 2 values.
Gxy
Sum of (x Q y) for all xy pairs in 2 lists.
a
Linear regression slope.
b
Linear regression y-intercept.
r
Correlation coefficient.
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.
(Continued)
TI-30X ÙS: A Guide for Teachers
A
A-5
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