The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
linear regression analysis (least-squares analysis, ordinary regression analysis)
A statistical technique for estimating the best linear relationship
between two variables. The estimated line has the property that the sum
of the squares of the deviations from the line is a minimum, hence the
name least-squares analysis. This statistical technique is commonly
applied to the data from a comparison of methods experiment, taking the
test method values as the y-variable and the comparison method values as
the xvariable. The statistics calculated usually include the slope (b),
y-intercept (a), and standard deviation about the regression line, also
termed the standard error of the regression line (sy/x) and also called
the standard deviation of residuals (sres). These statistics provide
information about the proportional, constant, and random errors between
the methods, respectively.