OMIS 2010 Chapter Notes - Chapter 13: Statistical Inference, Interval Estimation, Test Statistic
6 Oct 2011
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The methods of drawing inferences when comparing two populations were discussed in this chapter. When the data are quantitative and we want to compare measures of location, the parameter of interest is the difference between two means, 1 2 . When the descriptive measure is variability, we draw. In problems where the data are qualitative, the inferences about the ratio of two variances 1 parameter of interest is the difference between two proportions, p1 p2 . Because three new parameters were introduced in this chapter, the importance of being capable of identifying the correct technique to use is growing. As you work your way through each example and exercise below, make certain that you understand how we determine what the parameter is and what statistical technique needs to be employed. You are expected to know the following by the time you finish this chapter: how to apply the concepts and techniques of estimation and hypothesis testing introduced in.
