document.write( "Question 284762: assuming that the weights of a newborn babies at a certain hospital are normally distributed with mean 6.5 pounds and standard deviation 1.2 pounds, how many babies in a group of 80 babies from this hospital will weigh more than 8.9 pounds? \n" ); document.write( "
Algebra.Com's Answer #206565 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! assuming that the weights of a newborn babies at a certain hospital are normally distributed with mean 6.5 pounds and standard deviation 1.2 pounds, how many babies in a group of 80 babies from this hospital will weigh more than 8.9 pounds? \n" ); document.write( "------------------ \n" ); document.write( "z(8.9) = (8.9-6.5)/1.2 = 2 \n" ); document.write( "--- \n" ); document.write( "Use your z-chart or technology (EXCEL, calculator, or other means) \n" ); document.write( "find the following: \n" ); document.write( "P(z > 2) = normalcdf(2,100) = 0.02275.. \n" ); document.write( "I used a TI-84 to get my result. \n" ); document.write( "----------------------- \n" ); document.write( "In a group of 80 you would expect (0.02275)80 =1.82 babies to \n" ); document.write( "weigh more than 8.9 lbs. \n" ); document.write( "================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |