document.write( "Question 610031: a napa auto parts supplier wants information about how long car owners plan to keep their cars . A random sample of 41 car owners results in a mean of 7 years with a standard deviation of 3.75 years. Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error \n" ); document.write( "
Algebra.Com's Answer #384088 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! a napa auto parts supplier wants information about how long car owners plan to keep their cars . A random sample of 41 car owners results in a mean of 7 years with a standard deviation of 3.75 years. Find the 95% confidence interval for the true population mean. Identify the point estimate for mean and margin of error \n" ); document.write( "---- \n" ); document.write( "point estimate of the mean: 7 years \n" ); document.write( "---- \n" ); document.write( "ME = 1.96 = 1.1479 \n" ); document.write( "===================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "============ \n" ); document.write( " |