Hallo everyone. We are four students doing a paper in the course Business Analytics. We are doing a Conjoint analysis using SAS, and we have 16 profiles and two holdout profiles. We want to use proc corr in order to see how the rating correlate with the predicted values for the holdout cases. But when we do this we get that the correlation is 1.000 and -1.000. But when we include more of our active profiles, so that N increases we get output that look like we would think it should. Can it be, than N has to be bigger than 2 in order to use proc corr??? the code look like the following: ods output KendallCorr=k PearsonCorr=p; ods listing close; Proc corr nosimple noprob kendall pearson data = results1; Title3 'Holdout validation Results'; var Ppreference; with Tpreference; by notsorted participant; run; ods listing; Thank you in advance. Anne Duedahl
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