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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 35 (1965)No. 4. (December), Pages 973-975

Transformation of Weight--and Number--Frequencies for Phi-Normal Size Distributions: NOTES

Basanta K. SAHU

ABSTRACT

It is mathematically shown that for phi-normal size distributions when the frequency representation is changed from weight to number basis the mean of the distribution changes but the standard deviation (or variance) remains the same. An equation is derived which relates the means of the distributions and the constant variance. For approximate phi-normal distributions, however, the variance no longer remains constant, and the transformations from weight to number frequency or vice versa are not very accurate.


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