HP Prime Graphing NW280AAABA manual Scov, Cov, Σxy

Computed statistics

When you tap , three sets of statistics become available. By default, the statistics involving both the independent and dependent columns are shown. Tap to see the statistics involving just the independent

column or to display the statistics derived from the

dependent column. Tap to return to the default view. The tables below describe the statistics displayed in each view.

The statistics computed when you tap are:

Statistic Definition

nThe number of data points.

rCorrelation coefficient of the independent and dependent data columns, based only on the linear fit (regardless of the fit type chosen). Returns a value between –1 and 1, where 1 and –1 indicate best fits.

R2	The coefficient of determination,
	that is, the square of the correlation
	coefficient. The value of this
	statistics is dependent on the Fit
	type chosen. A measure of 1
	indicates a perfect fit.
sCOV	Sample covariance of independent
	and dependent data columns.
σ COV	Population covariance of
	independent and dependent data
	columns.
ΣXY	Sum of all the individual products of
	of x and y.

Statistics 2Var app 233