Evaluation Of A Correlation Analysis Essay - 905 Words

3.3.2.2 Correlation Analysis The next step was to perform a correlation analysis, among the selected 25 numerical variables (selected from PROC VARCLUS) and the 29 categorical variables. This technique is not a variable selection technique, but rather a variable elimination method (Aggarwal, 2011) which gives the correlation between variables. And by using the correlations, highly correlated variables can be removed from the analysis. By the correlation analysis performed, a heat map was generated. Thereafter, two numerical variables (Total Sales in Branch and Dairy Sales Total) were identified as highly correlated with other variables, hence was removed from the analysis. The code below was used to perform the correlation analysis of the data set given under ‘data’ and the variable set to be considered is given in ‘var’ (variable list available in Appendix 3). The output will be written to the file specified under ‘out’ attribute. Figure 3.3 gives a part of the heat map generated for the correlation analysis. Compared to the other variables, Dairy_Tot_br variable and sales_branch variable are correlated with many other variables. Therefore, these two variables were removed from the model. 3.3.2.3 Stepwise Regression The next step was to take a sample of the data set and to perform Stepwise Regression for 23 numerical variables and 29 categorical variables, to further reduce the number of predictor variables. By performing stepwise regression the total number ofShow MoreRelatedThe Big 5 And Job Satisfaction1307 Words   |  6 Pagesresearch has been correlated with many variables and factors. The following study uses a meta analysis procedure to evaluate the relationship between the Big 5 and job satisfaction rates and answer the following questions. You may also use your text in addition to help clarify information. Judge, T.A., Heller, D. Mount, M.K. (2002). 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