ABSTRACT
Observations collected by the researchers are studied critically by apply ing statistical techniques such as the formation of frequency distributions, histograms, frequency polygon, frequency curve, and other methods. Dif ferent characters give rise to similar or dissimilar distributions. Among the distributions, normal, binomial, and Poisson distributions have more practi cal importance and hence we study these distributions in more detail. Once we confirm that a particular character follows a specified mathematical dis tribution, we can study more about the phenomenon by employing the mathematical properties of the specific distribution. Mohr (1990) defines normal distribution as a curve given by a certain formula; many statistics have a sampling distribution that is normal. Numerous statistical techniques concerned with sampling involve the use of normal distribution.
