Texas Instruments -84 Plus, Manual Book

Page: 632 / 696

Appendix B: Reference Information 629
Statistics Formulas Statistics Formulas Statistics Formulas Statistics Formulas
This section contains statistics formulas for the
Logistic
and
SinReg
regressions,
ANOVA
,
2-Samp
Ü
Test
, and
2-SampTTest
.
Logistic Logistic Logistic Logistic
The logistic regression algorithm applies nonlinear recursive least-squares techniques to
optimize the following cost function:
which is the sum of the squares of the residual errors,
This technique attempts to estimate the constants
a
,
b
, and
c
recursively to make
J
as
small as possible.
where:
x
y
N
=
=
= the independent variable list
the dependent variable list
the dimension of the lists
J
c
1 ae
bx
i
–
+
------------------------ y
i
–
⎝ ⎠
⎜ ⎟
⎛ ⎞
2
i 1 =
N
∑
=