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CHAPTER 7: CROSS-SECTIONAL DATA ANALYSIS AND …
faculty.washington.eduCHAPTER 7: CROSS-SECTIONAL DATA ANALYSIS AND REGRESSION 1. Introduction In all our statistical work to date, we have been dealing with analyses of time-ordered data, or time series: the same variable or variables observed and measured at consecutive points of time. Usually but not necessarily, the points of time are equally spaced.