  In this paper, some statistical distributions of wide pairs included in
Double Star Catalogue are investigated. Frequency distributions and testing
hypothesis are derived for some basic parameters of visual binaries. The
results reached indicate that, it was found that the magnitude difference is
distributed exponentially, which means that the majority of the component of
the selected systems is of the same spectral type. The distribution of the mass
ratios is concentrated about 0.7 which agree with Salpeter mass function. The
distribution of the linear separation appears to be exponentially, which
contradict with previous studies for close binaries.
