Statistics is defined as the science of collection, presentation analysis and interpretation of numerical data. The field is divided into small plots of the same size and the same treatments are applied to all the plots and the yield in each plot is noted. This enables one to divide the field into relatively homogeneous subgroups is called block of equal fertility to control the experimental error. Additional points ( or ) lines to supplement a geometrical figure so as to prove some property of the figure are called constructions.