HP 40G User Manual page 106

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Two-variable
Statistic
MEANX
Σ
X
Σ
X2
MEANY
Σ
Y
Σ
Y2
Σ
XY
SCOV
PCOV
CORR
RELERR
8-14
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Definition
Mean of x- (independent) values.
Sum of x-values.
2
Sum of x -values.
Mean of y- (dependent) values.
Sum of y-values.
2
Sum of y -values.
Sum of each xy.
Sample covariance of independent
and dependent data columns.
Population covariance of independent
and dependent data columns
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.
The relative error (for the selected fit).
Provides a measure of accuracy for
the fit.
Statistics aplet