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Statistics 2Var app 233
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
n The number of data points.
r Correlation 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.
R
2
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.
COV Population covariance of
independent and dependent data
columns.
XY Sum of all the individual products of
of x and y.