A Question about Standard Deviation

[Susan Shapiro]

>From today's class:

If you know the mean and standard deviation for a population for the weight
of one item and you are trying to estimate the probability of a range of
weights when 12 items are weighed at the same time, can you simply multiply
the mean and SD by 12?

Susan J. Shapiro
Department of Psychology
Indiana University East 
2325 Chester Blvd.
Richmond, IN 47374
[EMAIL PROTECTED]
http://www.iue.indiana.edu/psych/index.html

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