A completely randomized design is useful when the experimental units are
A) homogeneous.
B) heterogeneous.
C) clustered.
D) stratified.

Question

A completely randomized design is useful when the experimental units are
A) homogeneous.
B) heterogeneous.
C) ​clustered.
D) stratified.

Quizplus · Accepted Answer

A completely randomized design is useful when the experimental units are homogeneous, meaning that they are all similar in terms of the response variable being studied. This allows for randomization to help control for any other sources of variation and to ensure that any observed differences between groups are due to the treatment being studied rather than some other factor. If the units were heterogeneous or clustered, a different experimental design may be more appropriate. And if the units were stratified, a stratified randomized design would be more appropriate.

A Completely Randomized Design Is Useful When the Experimental Units