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The basic design points are augmented with additional internal points:
The constraints on the mixture do not create a triangular region for the experiment (this assumes a three component design, designs with more components are harder to draw):
A type of design where the design points are placed on a 'lattice':
Constraints on the component proportions still allow the experimental region to be represented as a triangle (using a three component design as the basis for the explanation):
A type of experimental design that involves mixtures of ingredients. The distinctive feature of mixtures is that the proportions must add up to 100%.
A Type of mixture design with points at the corners, the midpoints of the sides, and the center:
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