In my lab I measure some chemical data. Output from the software I use contain also some stats, like the mean value, standard deviation and some number called SIGMA MEAN. My typical dataset looks like this:(adsbygoogle = window.adsbygoogle || []).push({});

sample MgO Al2O3

a 5,307872109 7,45113642

b 8,496074587 9,182072932

c 1,413995015 7,488017765

d 5,241196501 12,15347965

e 1,592772949 7,863316958

f 0,518347063 4,050451192

g 1,117824945 5,952661741

Mean value: 3,384011881 7,734448094

Sigma: 2,992231593 2,53402361

Sigma mean: 1,130957237 0,957770898

I know what is mean value and standard deviation sigma, but I never heard about sigma mean. It is always smaller than sigma and it seems to depend on sigma. Please do somebody know what it is Sigma mean?

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# What is SIGMA MEAN ?

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