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Mixed two- and four-level fractional factorial split-plot designs with clear effects. (English) Zbl 1238.62089
Summary: Mixed-level designs have become widely used in practical experiments. When the levels of some factors are difficult to be changed or controlled, fractional factorial split-plot (FFSP) designs are often used. It is important to know when a mixed-level FFSP design with resolution III or IV has clear effects. This paper investigates the conditions of a resolution III or IV FFSP design with both two-level and four-level factors to have various clear factorial effects, including two types of main effects and three types of two-factor interaction components. The structures of such designs are shown and illustrated with examples.

##### MSC:
 62K15 Factorial statistical designs
##### Keywords:
resolution; whole-plot factor; sub-plot factor
Full Text:
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