Definition of Parametric and Non-parametric Statistics Assumptions of Parametric and Non-parametric Statistics Assumptions of Parametric Statistics Assumptions of Non-parametric Statistics Advantages of Non-parametric Statistics Disadvantages of Non-parametric Statistical Tests Parametric Statistical Tests for Different Samples Parametric Statistical Measures for Calculating the Difference Between Means Significance of Difference Between the Means of Two Independent Large and Small Samples Significance of the Difference Between the Means of Two Dependent Samples Significance of the Difference Between the Means of Three or More Samples Parametric Statistics Measures Related to Pearson’s ‘r’ Non-parametric Tests Used for Inference