Partial Correlation

1. Follow the procedures detailed in Chapter 12 of the SPSS Survival Manual to calculate the partial correlation between optimism (toptim) and perceived stress (tpstress) while controlling for the effects of age. Compare the zero order correlations with the partial correlation coefficients to see if controlling for age had any effect.
2. Follow the same procedure while controlling for the effect of education.
3. Interpret the results of the output.

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