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Answer:

Yes. , by following this process:

1. Go to

...

1. ‘Options > Advanced > Preferences’ (or press F12)

...

1. ;
2. In the ‘Weight Function, m =

...

1. ’ field, write n*((1-y)*m+y*(1-m))/(m*(1-m))^2.

This will give you the minimum χ2 estimate minimum²  estimates of the regression parameters (See example).

Remark: this example illustrates the possibilities offered by CombiStats. The default method – which is also the method of choice in the European Pharmacopoeia – is estimation by Maximum Likelihood.