TI-83 Plus Tables and Reference Information 721
Statistics Formulas
This section contains statistics formulas for the Logistic and SinReg
regressions, ANOVA, 2.SampÜTest, and 2.SampTTest.
Logistic
The logistic regression algorithm applies nonlinear recursive least-
squares techniques to optimize the following cost function:
2
11
∑
=−
−
+
=N
ii
i
bx y
ae
c
J
which is the sum of the squares of the residual errors,
where: x= the independent variable list
y= the dependent variable list
N= the dimension of the lists
This technique attempts to estimate the constants a, b, and c recursively
to make J as small as possible.