Operation Manual

Statistics 12-13
8212STAT.DOC TI-82, Chapter, English Bob Fedorisko Revised: 02/09/01 9:23 AM Printed: 02/09/01
12:42 PM Page 13 of 22
Statistical Analysis
Pressing
… ~
accesses the STAT CALC menu, where you set up and perform
statistical calculations. The TI
.
82 can analyze one-variable or two-variable
statistics. Both can have associated frequencies.
STAT CALC Menu
EDIT CALC
1: 1-Var Stats
Calculates 1-variable statistics.
2: 2-Var Stats
Calculates 2-variable statistics.
3: SetUp
…
Defines lists to use in calculations.
4: Med-Med
Calculates median-median line.
5: LinReg(ax+b)
Fits data to linear model.
6: QuadReg
Fits data to quadratic model.
7: CubicReg
Fits data to cubic model.
8: QuartReg
Fits data to quartic model.
9: LinReg(a+bx)
Fits data to linear model.
0: LnReg
Fits data to logarithmic model.
A: ExpReg
Fits data to exponential model.
B: PwrReg
Fits data to power model.
SET UP CALCS Screen
When you select
SetUp...
, the
SET UP CALCS
screen appears, where you
can define a statistical analysis.
¦
1-Var Stats
(one-variable statistics) analyzes data with one measured
variable.
¦
2-Var Stats
(two-variable statistics) analyzes paired data between
which there is a relationship.
Xlist
is the independent variable.
Ylist
is
the dependent variable.
¦
Freq
(frequency of occurrence) is a list of integers between 0 and 99
(inclusive).
Freq
is optional; the default is
1
. It is valid for one-variable
or two-variable statistics.
Note: You can override
SET UP CALCS
settings by specifying the name(s)
of the list(s) after the statistical calculation instruction (Appendix A).
Changing Settings
To change a setting on the
SET UP CALCS
screen, use
†
,
}
,
~
, and
|
to
position the cursor and then press
Í
.