Two-variable

Plotting

Statistic

Definition

 

 

MEANX

Mean of x- (independent) values.

ΣX

Sum of x-values.

ΣX2

Sum of x2-values.

MEANY

Mean of y- (dependent) values.

ΣY

Sum of y-values.

ΣY2

Sum of y2-values.

ΣXY

Sum of each xy.

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 for 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.

 

 

You can plot:

•histograms ()

•box-and-whisker plots ()

•scatter plots ( ).

Once you have entered your data ( ), defined your

data set ( ), and defined your Fit model for two-

variable statistics (SETUP-SYMB), you can plot your data. You can plot up to five scatter or box-and-whisker plots at a time. You can plot only one histogram at a time.

Statistics aplet

10-15