Texas Instruments -30XIIS - Handheld Scienfic Calculator, Руководство пользователя

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© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
75
Keys
1.
% t
displays a 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.
2.
v
lets you enter data points ( x for
1-VAR
stats; x and y for
2-VAR
stats).
3.
% w
displays the following menu
that lets you clear data values and exit
STAT
mode.
EXIT ST: Y N
•
Press
<
when Y (yes) is
underlined to clear data values and
exit
STAT
mode.
•
Press
<
when N (no) is
underlined to return to the previous
screen without exiting
STAT
mode.
4.
u
displays the menu of 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.
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.
Statistics
3
2
1
4
12