HP 40G Fitting a curve to0182VAR data, Correlation, Coefficient, Relative Error, 27@,7 +260%@

Fitting a curve to0(182VAR data

In the Plot view, press ),7_. This draws a curve to fit the checked two-variable data set(s). See “To choose the fit” on page - 1.

>3/27@),7

6+2:>6<0%@

	The expression in Fit2
	shows that the
	slope=1.98082191781 and
Correlation	the y-intercept=2.2657.
	The correlation coefficient is stored in the CORR variable. It is
coefficient	a measure of fit to a linear curve only. Regardless of the Fit
	model you have chosen, CORR relates to the linear model.
Relative Error	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.
	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.
H I N T
	In order to access these variables after you plot a set of
	statistics, you must press >180@ to access the numeric view
	and then 67$76_to display the correlation values. The values
	are stored in the variables when you access the Symbolic
	view.

Statistics aplet 8-17