Problem 14-66 What is the distinction between distribution-free methods and nonparametric methods? Some authors distinguish between non-parametric and distribution-free procedures. Distribution-free test procedures are broadly defined as: 1. Those whose test statistic does not depend on the form of the underlying population distribution from which the sample data were drawn, or 2. Those for which the data are nominally or ordinally scaled. Nonparametric test procedures are defined as those that are not concerned with the parameters of a distribution. Problem 14-68 In a chi-square analysis, the expected count in one of the cells is 2.1. Can you conduct the analysis? If not, what can be done? One of the assumptions of the chi-square test is that the expected count of each cell is at least 5. A common rule is that the expected count has to be 5 or more in all
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