Students' tables of the unit normal curve, for abscissae expressed in terms of the probable error or PE: I. Areas corresponding to abscissae. II. Abscissae corresponding to areas

The authors give a table of the areas of the normal curve corresponding to abscissa units of .01 PE between 0.00 and 5.00 and units of .1 PE between 5.00 and 10.00. The areas are stated as percentages with at least four significant figures. A second table gives the PE deviation corresponding to percentages of cases above (or below) the mean. The percentage units are 0.1 between 0.0 and 45.0 and .01 between 45.0 and 45.99. The use of the PE , instead of |c, is urged.