compute the blom position test. The Blom position test is a quanitiative method for evaluating the data in probably plots taken directly from: Use of the Correlation Coefficient with Normal Probability Plots Stephen W. Looney; Thomas R. Gulledge, Jr. The American Statistician, Vol. 39, No. 1. (Feb., 1985), pp. 75-79. Stable URL: http://links.jstor.org/sici?sici=0003-1305%28198502%2939%3A1%3C75%3AUOTCCW%3E2.0.CO%3B2-T; The use of the correlation coefficient is suggest as a technique for summarazing and objectivly evaluation the information contained in probably plots. Goodness-of-fit tests are constricted using this technique for several commonly used plotting positions for the normal distrobution. Empirical sampling methods are used to construct the null distrobution for these tests, which are then comparied on the basis of power against certain nonnormal alternatives. Commonly used regression tests of fit are also included in the comparisions. The results indicate that the use of the plottinf position P_i = (i-0.375)/(n+0.25) yeilds a competitive regession test of fit for normality.

One should be careful to understand this a bit before blind use

1: The distrobution is normal 0: The distrobusion is not normal