<PRE><B>Question 620910</B>
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True.


If population *[tex \LARGE \sigma] is known, then *[tex \LARGE E\ =\ Z_{\small{a/2}\LARGE}\,\frac{\sigma}{\sqrt{n}]


If population *[tex \LARGE \sigma] is not known, then *[tex \LARGE E\ =\ t_{\small{a/2}\LARGE}\,\frac{s}{\sqrt{n}]


Either way, the three elements of the formula are level of confidence, standard deviation (population or sample), and sample size.


John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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