The special feature of this hook is its simplicity and the systematic style of presentation of' the subject matter. The assumption and conditions on which various analysis and planning of the designs are based have been explained by means of simple, stepwise and straight strategy. The examples and theory have been taken from various books, manuals and reports for the benefit of students and teachers to comprehend and appreciate the actual problem faced in planning of experiments and analysis for inference. All such references have been listed at the end of book. Authours wish to acknowledge their input where ever used. Some hypothetical examples have also been considered to make the concept clear and practically oriented. The implication of the results emerging from analysis has been discussed with simplicity and thoroughness.