Herbert S. Conrad

A seven-decimal table of the area (a) under the unit normal curve, for abscissae expressed in terms ofP.E

A seven-decimal table is presented of the area under the unit normal curve, for abscissae expressed in terms of the “probable error” orPE. From the method of calculation, the partial verification by means of other tables, and the safeguards taken in the routine of computation, it is safe to consider the table reliable. Errors in previously published tables are pointed out.