Statistics - Texas Instruments TI-30X IIS User Manual

Keys
1. % t displays a menu from which you
can select
1-VAR, 2-VAR
Analyzes data from 1 set
1-VAR
of data with 1 measured
variable— x .
nalyzes paired data from
2-VAR A
2 sets of data with 2
measured variables— x , the
independent variable, and
y , the dependent variable.
Clears data values without
CLRDATA
exiting
2. v lets you enter data points ( x for
stats; x and y for
1-VAR
© 1999 T I I
EXAS NSTRUMENTS NCORPORATED
or .
CLRDATA
mode.
STAT
stats).
2-VAR
1
3
4
2

Statistics

3. % w displays the following menu
that lets you clear data values and exit
mode.
STAT
EXIT ST: Y N
Press < when Y (yes) is
underlined to clear data values and
exit mode.
STAT
Press < when N (no) is
underlined to return to the previous
screen without exiting
4. u displays the menu of variables
with their current values.
Number of x (or x , y ) data
n
points.
v or w Mean of all x or y values.
or Sample standard deviation
Sx Sy
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.
2 2
G or G Sum of all x
x y
values.
Sum of ( x Q y) for all xy
G
xy
pairs in 2 lists.
Linear regression slope.
a
Linear regression
b
y -intercept.
Correlation coefficient.
r
Notes
The examples on the transparency masters
assume all default settings.
To save the last data point or frequency
value entered, you must press < or $.
You can change data points once they are
entered.
TI-30X ÙS: A Guide for Teachers
12
mode.
STAT
values or y
2 2
75