Basic Principles of Experimental Design
Experimental research designs, which can otherwise be called hypothesis-testing research designs, were originally made by R.A. Fisher in agricultural research in England. Experimental designs are generally used in experimental studies where hypothesis are tested. Experimental designs are now used in almost all the areas of scientific studies. Professor Fisher has enumerated three principles of experimental designs: 1. The principle of replication: The experiment should be reaped more than once. Thus, each treatment is applied in many experimental units instead of one. By doing so, the statistical accuracy of the experiments is increased. For example, suppose we are to examine the effect of two varieties of rice. For this purpose we may divide the field into two parts and grow one variety in one part and the other variety in the other part. We can compare the yield of the two parts and draw conclusion on that basis. But if we Continue reading