A Prepunched Master Deck for the Computation of Square Roots on IBM Electrical Accounting Equipment  

Oleh:

Reynolds, Wm. A.

Jenis: Article from Journal - e-Journal
Dalam koleksi: Psychometrika: A Journal of Quantitative Psychology vol. 11 no. 4 (Dec. 1946), page 223-238.
Topik: Square Roots; Electrical Accounting Equipment; Correction Formula
Fulltext: A Prepunched Master Deck for the Computation of Square Roots on IBM Electrical Accounting Equipment.pdf (626.29KB)

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This paper presents a prepunched deck of cards to enable the extraction of square roots on standard punch card tabulating equipment. Such a deck is valuable in constructing mathematical tables which involve square roots or in obtaining standard deviations in connection with computing correlation coefficients. By using a deck of reciprocals in conjunction with the deck for square roots, correlations may be solved completely on IBM equipment.

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