HP 39g Graphing Calculator - Manual (Page 108)

Two-variable
Statistic Definition
MEANX Mean of-i- (independent) values.
ZX Sum of ,r-values.
ZX2 Sum of ,T^-values.
MEANY Mean of >■- (dependent) values.
ZY Sum of y-values.
ZY2 Sum o f y^-valms.
ZXY Sum of each x>’.
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 /br 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.
8-14 Statistics aplet