Published online by Cambridge University Press: 01 January 2025
A seven-decimal table is presented of the area under the unit normal curve, for abscissae expressed in terms of the “probable error” or PE. 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.
For criticism of the manuscript and valuable suggestions, the writers are indebted to Professors Raymond T. Birge, Albert H. Mowbray, Noel Keys, and Miss Louise Boulware. For assistance in certain portions of the computations, we wish to acknowledge the services of Mrs. Mildred E. Conrad and Mrs. Lina H. Aylesworth.