Control Charts for Log-Normal Universes


Ferrell, Enoch B.   (1958, ASQC)   Bell Telephone Laboratories, Inc.

Industrial Quality Control    Vol. 15    No. 2
QICID: 4339    August 1958    pp. 4-6
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Article Abstract

Samples from a badly skewed universe which can be approximated by a Log-Normal distribution may be computed and plotted on control charts by a method described in this article. Direct computation is proposed which can be done on the slide rule.


Statistical process control (SPC)

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