Statistics - Texas Instruments TI-34 II Explorer Plus User Manual

Statistics

Keys
These numbered paragraphs provide
explanations for the corresponding numbered
keys on the illustration below.
1. %t displays a menu from which
you can select
1-VAR
Analyzes data from 1 set
1-VAR
of data with 1 measured
variable: x.
Analyzes paired data with
2-VAR
2 measured variables: x,
the independent variable,
and y, the dependent
variable.
Clears data values
CLRDATA
without exiting STAT
mode.
2. v lets you enter data points (x for
1-VAR stats; x and y for 2-VAR stats).
© 1999 T I
EXAS NSTRUMENTS
, or
2-VAR CLRDATA
1
3
4
2
I
NCORPORATED
3. %w displays the following
menu that lets you clear data values
and exit
STAT
EXIT ST: Y N
Press < when
underlined to clear data values and
.
exit STAT mode.
Press < when
to return to the previous screen
without exiting STAT mode.
4. u displays the menu of
variables with their current values.
n
v or w
Sx or Sy
sx or sy
Gx or Gy
2 2
Gx or Gy
Gxy
a
b
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-34 Û: A Guide for Teachers
12
mode.
(yes) is
Y
(no) is underlined
N
Number of x (or x,y) data
points
Mean of all x or y values
Sample standard
deviation of x or y
Population standard
deviation of x or y
Sum of all x values or y
values
2
Sum of all x values or y
values
Sum of (x times y) for all
xy pairs in 2 lists
Linear regression slope
Linear regression y-
intercept
Correlation coefficient
2
89