document.write( "Question 321775: find the critical value Zc necassary to form a confidence interval at the level of confidence C=0.89 \n" ); document.write( "
Algebra.Com's Answer #230372 by stanbon(75887)\"\" \"About 
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find the critical value Zc necassary to form a confidence interval at the level of confidence C=0.89
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\n" ); document.write( "Find the z-value with a right tail of 11/2 = 5.5%
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\n" ); document.write( "invnorm(0.945) = 1.5942
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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