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What is local control in experimental design


Local control means the control of all factors except the ones about which we are investigating. Local control, like replication is yet another device to reduce or control the variation due to extraneous factors and increase the precision of the experiment.

What are the 3 principles of experimental design?

Three main pillars of experimental design are randomization, replication, and blocking, and we will flesh out their effects on the subsequent analysis as well as their implementation in an experimental design.

What are the 4 principles of experimental design?

Section 2: Experimental Studies\n\n True experiments have four elements: manipulation, control , random assignment, and random selection. The most important of these elements are manipulation and control.

Why local control is not used in CRD?

CRD is based on two principles i.e. randomisation and replication. The third principle, i.e. local control is not used because it is assumed that experimental materials are homogeneous.

What do you mean by control error in design of experiment?

Grouping of homogenous experimental units into blocks is known as local control of error. In order to have valid estimate of experimental error the principles of replication and randomization are used. In order to reduce the experimental error, the principles of replication and local control are used.