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A Summary of
Fitting Formulas
To wrap up,
let us summarise what we have
accomplished
so far:

= 

(2.1) 
S_{x} 
= 

(2.2) 
S_{xx} 
= 

(2.3) 
a 
= 

(2.4) 

= 

(2.5) 

= 

(2.6) 

= 

(2.7) 
Q 
= 

(2.8) 
where Q is the so called goodness of fit and
is
the Euler gamma function.
Q is the probability that
a value of
as poor as the one obtained in your
calculations, using your values of x_{i} and y_{i},
would have occurred by chance. The value of Q is between 0 and 1.
The closer Q is to 1, the more trustworthy is your theory which
has assumed a linear dependence of y on x.
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Previous: Fitting in Maxima
Zdzislaw Meglicki
20010226