document.write( "Question 632206: the z-value for a confidence level of 80% is \n" ); document.write( "
Algebra.Com's Answer #398116 by stanbon(75887)\"\" \"About 
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the z-value for a confidence level of 80% is
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\n" ); document.write( "You have two 10% tails.
\n" ); document.write( "z-value is +-1.2816
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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