8. Mixing plans
Mixture designs are experimental designs used when studying products
composed of several components
8.1 Mathematical model
The factors are the concentrations x
i
of each constituent
i in the mixture. The y responses are expressed as a function of these
concentrations. The following constraint must be taken into account:
the sum of the concentrations of the constituents of a mixture is
equal to one hundred percent. There is therefore the following relationship
between x
i
:
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