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Transcript
Finding a Sample Size for
Estimating a Population Mean
 = population mean
σ = population standard deviation
x = population standard deviation
E = desired margin of error
zα/2 = z score separating an area of /2 in the right tail of
the standard normal distribution
n=
(z/2)  
Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved.
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