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)     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( " |