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Statistics Programs
16–1
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
16
Statistics Programs
Curve Fitting
This program can be used to fit one of four models of equations to your data. These
models are the straight line, the logarithmic curve, the exponential curve and the
power curve. The program accepts two or more (
x, y) data pairs and then
calculates the correlation coefficient,
r, and the two regression coefficients, m and
b. The program includes a routine to calculate the estimates
x
ˆ
and
y
ˆ
. (For
definitions of these values, see "Linear Regression" in chapter 11.)
Samples of the curves and the relevant equations are shown below. The internal
regression functions of the HP 33s are used to compute the regression coefficients.