Two-variable – HP 39g Graphing Calculator User Manual
Page 108
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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