A new procedure is presented which allows, based on the Kendall tau-coefficient, one to test for partial correlation in the presence of censored data. Further, a significance level can be assigned to the partial correlation - an aspect which has not been addressed in the past, even for the uncensored data. The results of various tests with simulated data are reported. Finally, we apply this newly developed methodology to estimate the influence of selection effects on the correlation between the soft X-ray luminosity and both total and core radio luminosities in a complete sample of active galactic nuclei.
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- February 1996
- METHODS: STATISTICAL;
- GALAXIES: ACTIVE;
- X-RAYS: GALAXIES;
- 5 pages, 2 figs incl., uuencoded compressed postscript, accepted for publication in MNRAS