Operation Manual

12-16 Statistics
8212STAT.DOC TI-82, Chapter, English Bob Fedorisko Revised: 02/09/01 9:23 AM Printed: 02/09/01
12:42 PM Page 16 of 22
LinReg (a+bx)
LinReg (a+bx)
(linear regression,
STAT CALC
item
9
) fits the data to the
model equation
y=a+bx
using a least-squares fit and
x
and
y
. It displays
a
(
y
-intercept),
b
(slope), and
r
(correlation coefficient).
LnReg
LnReg
(logarithmic regression,
STAT CALC
item
0
) fits the data to the
model equation
y=a+b ln(x)
using a least-squares fit and transformed values
ln(x)
and
y
. It displays
a
,
b
, and
r
(correlation coefficient).
ExpReg
ExpReg
(exponential regression,
STAT CALC
item
A
) fits the data to the
model equation
y=ab
x
using a least-squares fit and transformed values
x
and
ln(y)
. It displays
a
(
y
-intercept),
b
, and
r
(correlation coefficient).
PwrReg
PwrReg
(power regression,
STAT CALC
item
B
) fits the data to the model
equation
y=ax
b
using a least-squares fit and transformed values
ln(x)
and
ln(y)
. It displays
a
,
b
, and
r
(correlation coefficient).