12.2 Correlation Test

The paired sample correlation test is performed on two samples. The two samples are expected to be paired (two observations for the same entity). The null hypothesis is that the two samples have no (i.e., 0) correlation.

Rattle uses Pearson’s product moment correlation coefficient.

If the p-value is less than 0.05 then we reject the null hypothesis and accept the alternative hypothesis that the samples are correlated, at the 95% level of confidence.

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