The first of two sub-groups has 10 items withmean 15 and standard deviation 3. If the wholegroup has 250 items. with mean 15.6 andstandard deviation v13.44, find the standarddeviation of the second. sub-group.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The first of two sub-groups has 10 items with mean 15 and standard deviation 3. If the whole group has 250 items. with mean 15.6 and standard deviation v13.44, find the standard deviation of the second. sub-group.