document.write( "Question 1193141: Construct the confidence interval for the population. mean c = 0.90; x = 8.6 , sigma = 0.6 and n = 42 A 90% confidence interval for is ____ (Round to two decimal places as needed.) \n" ); document.write( "
Algebra.Com's Answer #825193 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
the half-interval is z(0.95)*0.6/sqrt(42)
\n" ); document.write( "=0.1523
\n" ); document.write( "interval is (8.45, 8.75)
\n" ); document.write( "
\n" );