Texas Instruments TI-82 STATS Manual Book page 225

1.Var Stats
2.Var Stats
Med.Med
(ax+b)
LinReg
(ax+b)
QuadReg
(ax2+bx+c)
(one-variable statistics) analyzes data with one
1.Var Stats
measured variable. Each element in freqlist is the frequency of
occurrence for each corresponding data point in Xlistname.
freqlist elements must be real numbers > 0.
[Xlistname
1.Var Stats
(two-variable statistics) analyzes paired data.
2.Var Stats
Xlistname is the independent variable. Ylistname is the
dependent variable. Each element in freqlist is the frequency of
occurrence for each data pair (Xlistname,Ylistname).
[Xlistname
2.Var Stats
(median-median) fits the model equation y=ax+b to
Med.Med
the data using the median-median line (resistant line) technique,
calculating the summary points
displays values for
Med.Med
[Xlistname
Med.Med
(linear regression) fits the model equation y=ax+b to
LinReg(ax+b)
the data using a least-squares fit. It displays values for
(y-intercept); when
b
2
for and .
r r
[Xlistname
LinReg(ax+b)
(quadratic regression) fits the second-degree
QuadReg
2
polynomial y=ax +bx+c to the data. It displays values for
and ; when
c DiagnosticOn
For three data points, the equation is a polynomial fit; for four
or more, it is a polynomial regression. At least three data points
are required.
[Xlistname
QuadReg
freqlist]
,
Ylistname freqlist]
, ,
, ,
x y
1 1
(slope) and
a
Ylistname freqlist
, ,
is set, it also displays values
DiagnosticOn
Ylistname freqlist
, ,
is set, it also displays a value for
Ylistname freqlist
, ,
, , , and .
x y x y
2 2 3 3
(y-intercept).
b
regequ]
,
(slope) and
a
regequ]
,
regequ]
,
Statistics 12–25
, ,
a b
2
.
R