Research is generally conducted on a representative sample so as to draw generalizations for the population from which the sample was drawn. Inferential or sampling statistics are useful in making generalizations or inferences about populations from the observation of the characteristics of samples. Certain statistics (sample values) are computed for making inferences for estimating the parameter from the sample statistics with a known degree of accuracy. The degree to which a sample statistics represents its parameter is an index of the significance of the computed sample statistics. It is possible to make inferences about various parameters in this chapter.