New Determination of the Hubble Parameter Using the Principle of Terrestrial Mediocrity

Measurements of the linear diameters of 12 nearby spiral galaxies with distances determined from primary indicators suggest that both the Milky Way Galaxy and M31 are in the middle of the range of sizes for such galaxies. By comparing the measured linear diameters of these nearby systems with the inferred diameters of a sample of more than 3000 spirals with known redshifts, we conclude that the most likely value of the Hubble Parameter lies in the range 50 - 55 km/s Mpc^{-1}