Statistics Programs; Curve Fitting - HP 35s User Manual

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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
x ˆ
y ˆ
program includes a routine to calculate the estimates and . (For definitions of
these values, see "Linear Regression" in chapter 12.)
Samples of the curves and the relevant equations are shown below. The internal
regression functions of the HP 35s are used to compute the regression coefficients.
16-1
Statistics Programs