Nested design, Advanced Statistics

Nested design is the design in which levels of one or more factors are subsampled within one or more other factors such that, for instance, each level of a factor B happens at only one level of another factor A. Factor B is said to be nested within the factor A. An instance might be where interest centres on assessing the effect of the hospital and doctor on a response variable, patient satisfaction. The doctors can practice at one hospital only so they are nested within hospitals.

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