Why variances add - and why it matters.


Book: 
Thinking and reasoning with data and chance: Sixty-eighth Yearbook.
Authors: 
Bock, D., & Velleman, P. F.
Editors: 
Burrill, G. F.
Type: 
Category: 
Pages: 
377-390
Year: 
2006
Publisher: 
National Council of Teachers of Mathematics. Reston, VA.
Abstract: 

We present examples in which the addition of variances is key to gaining insight when dealing with binomial probabilities, inference and the central limit theorem.

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