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an experiment where assignment of units to exposure/treatment groups are manipulated, randomized or controlled by chance

• Replicated Experiment

• Randomized Experiment

• Biased Experiment

• Scientific Research

a structure of experimental design which refers to grouping of the experimental units into homogeneous groups or blocks

• Design Structure

• Treatment Structure

• Effect Structure

• No structure

Aside from providing an estimate of the experimental error, replication also increases the ___________ of the

estimates of the parameter.

A principle of experimental design which incorporates all possible means of minimizing the experimental error

___________ plays an important role in every essential stage of research such as in planning, data collection, analysis, and interpretation of results