Fitting A Curve To 2Var Data - HP 39g+ User Manual

Fitting a curve to 2VAR data

Correlation
coefficient
Relative Error
Statistics aplet
To connect the data points as
they are plotted, checkmark
CONNECT in the second
page of the Plot Setup. This is
not a regression curve.
In the Plot view, press
checked two-variable data set(s). See "To choose the fit"
on page 8-12.
The expression in Fit2
shows that the
slope=1.98082191781
and the y-
intercept=2.2657.
The correlation coefficient is stored in the CORR variable.
It is a measure of fit to a linear curve only. Regardless of
the Fit model you have chosen, CORR relates to the linear
model.
The relative error is a measure of the error between
predicted values and actual values based on the specified
Fit. A smaller number means a better fit.
The relative error is stored in a variable named RELERR.
The relative error provides a measure of fit accuracy for
all fits, and it does depend on the Fit model you have
chosen.
. This draws a curve to fit the
8-17