document.write( "Question 1034038: Find the critical value zc necessary to form a confidence interval at the level of confidence c=.80 \n" ); document.write( "
Algebra.Com's Answer #648651 by rothauserc(4718)\"\" \"About 
You can put this solution on YOUR website!
zc = 1.645 for 80% CI
\n" ); document.write( ":
\n" ); document.write( "
\n" );