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Math Forum » Discussions » sci.math.* » sci.stat.math.independent

Topic: standard deviation for 1-mean?
Replies: 7   Last Post: Jan 21, 2012 4:35 PM

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dvdavins@pobox.com

Posts: 4
Registered: 1/20/12
Re: standard deviation for 1-mean?
Posted: Jan 20, 2012 6:22 PM
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The sd of X + Y is the sd of X + the ds of Y. Since 1 is a constant, it has a sd of 0. I'll let you finish it from here.

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