For two-stage Quincunx

Details For two-stage Quincunx For two-stage Quincunx

1989-01-06

1990-02-13

Grieb, William H.

Education and demonstration

Mathematics

273120R, 434208, G09B 1900, G09B 2302

Patent

active

049002554

ABSTRACT:
A two-stage training device for statistical studies permits the demonstration of advanced statistical principles. Balls are dropped from an upper reservoir through a maze of pins which scatters the balls into a histogram having that shape of a normal curve. The balls from individual cells of the histograms are dropped through a second maze of pins into a second set of vertical cells to form a series of histograms. Dropping subsequent sets of balls from many of the upper cells, visually demonstrates, that: "The Sum Of Normal Independent Sets Of Events Is Normal".

REFERENCES:
patent: 1275613 (1918-08-01), Sedlak, Jr.
patent: 2789371 (1957-04-01), Shanhouse
patent: 3433484 (1969-03-01), Wallenmeyer
C. H. Stoelting Co. Catalog, 1930, p. 1, No. 10160, 8-1930.
Quantum Company Catalog, TP51, 3-1985.
Quantum Company Catalog, "34 New Products" 3-1988.

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