Texas Instruments TI-86 - Entering an Equation in the Equation-Entry Editor

Chapter 14: Statistics
191
14STATS.DOC TI-86, Chap 14, US English Bob Fedorisko Revised: 02/13/01 2:33 PM Printed: 02/13/01 3:04 PM Page 191 of 1414STATS.DOC TI-86, Chap 14, US English Bob Fedorisko Revised: 02/13/01 2:33 PM Printed: 02/13/01 3:04 PM Page 191 of 14
For
OneVa
, the syntax is:
OneVar ãxList,frequencyListä
For
TwoVa
, the syntax is:
TwoVar
ã
xLlist,yList,frequencyList ä
For
LinR
,
LnR
,
ExpR
,
PwrR
,
P2Reg
,
P3Reg
, and
P4Reg
, the syntax is:
TwoVar ãxList,yList,frequencyListä
For
SinR
, the syntax is:
SinR ãiterations,xList,yList,period,equationVariableä
iterations
is the number of iterations to go through; higher values for iterations produce a
better fit, but take longer to calculate.
period
is an initial guess at which to begin calculation.
For
LgstR
, the syntax is:
LgstR ãiterations,xList,yList,frequencyList,equationVariableä
To copy the contents
RegEq
to any variable after calculating the regression, the syntax is:
StReg(variable)
Automatic Regression Equation Storage
LinR
,
LnR
,
ExpR
,
PwrR
,
SinR
,
LgstR
,
P2Reg
,
P3Reg
, and
P4Reg
are regression models. Each
regression model has an optional argument,
equationVariable
, for which you can specify an
equation variable, such as
y1
. Upon execution, the regression equation is stored
automatically to the specified equation variable, and the function is selected.
Regardless of whether you specify
equationVariable
, the regression equation always is
stored to the result variable
RegEq
, which is an item on the
STAT VARS
menu. The
regression equation displays the actual result values.
When you select
OneVa
or
TwoVa
, the abbreviation
OneVar
or
TwoVar
is
displayed.
For
PwrR
and
ExpR
, the
elements of
xList
and
yList
must be integers
‚
1.
Default for
iterations
is 64.