HP 39gs Graphing manual Plotting, Two-variable, Columns for a linear fit only

Two-variable

Plotting

Statistic	Definition
MEANX	Mean of x- (independent) values.
ΣX	Sum of x-values.
ΣX2	Sum of x2-values.
MEANY	Mean of y- (dependent) values.
ΣY	Sum of y-values.
ΣY2	Sum of y2-values.
ΣXY	Sum of each xy.
SCOV	Sample covariance of independent
	and dependent data columns.
PCOV	Population covariance of
	independent and dependent data
	columns
CORR	Correlation coefficient of the
	independent and dependent data
	columns for a linear fit only
	(regardless of the Fit chosen).
	Returns a value from 0 to 1, where
	1 is the best fit.
RELERR	The relative error for the selected
	fit. Provides a measure of accuracy
	for the fit.

You can plot:

•histograms ( )

•box-and-whisker plots ( )

•scatter plots ( ).

Once you have entered your data ( ), defined your

data set ( ), and defined your Fit model for two-

variable statistics ( SETUP-SYMB), you can plot your data. You can plot up to five scatter or box-and-whisker plots at a time. You can plot only one histogram at a time.

Statistics aplet 10-15