With raking, a researcher chooses a set of variables where the population distribution is known, and the procedure iteratively adjusts the weight for each case until the sample distribution aligns ...

KnowledgePanel’s recruitment process was originally based on a national RDD sampling methodology. In 2009, the panel switched to using an ABS methodology. Here is additional information about the ...

Example 55.3: Regression with Quantitative and Qualitative Variables At times it is desirable to have independent variables in the model that are qualitative rather than quantitative. This is easily ...

A summary of ABC News' polling standards and survey methodology follows. Standards. ABC News maintains standards for disclosure, validity, reliability and unbiased content in survey research and ...

Removal of redundant explanatory variables. The problems of collinearity and multicollinearity in the three examples might be diagnosed using either the VIF or the condition index.Although VIF ...

With a two-way ANOVA, there are two independent variables. For example, ... The term became well-known in 1925 after appearing in Fisher's book, "Statistical Methods for Research Workers." ...

The BrandZ valuation methodology, used to calculate the Top 100 Global Brands, combines extensive and continuing consumer research with rigorous financial analysis. BrandZ is distinguished from ...