A multivariate statistical analysis of spiral galaxy luminosities. I. Data and results

We have performed a multiparametric analysis of luminosity data for a sample nof 234 normal spiral and irregular galaxies observed in X-rays with the { it nEinstein Observatory}. This sample is representative of S and Irr galaxies, nwith a good coverage of morphological types and absolute magnitudes. In naddition to X-ray and optical da ta, we have compiled H-band..