document.write( "Question 1175528: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately
\n" );
document.write( "σ
\n" );
document.write( "=
\n" );
document.write( "62.4
\n" );
document.write( " . We would like to be 99.5% confident that the esimate is within 2.5 of the true population mean. How large of a sample size is required? \n" );
document.write( "
Algebra.Com's Answer #801164 by ewatrrr(24785)![]() ![]() You can put this solution on YOUR website! \r\n" ); document.write( "Hi\r\n" ); document.write( "Normal distribution: σ = 62.4\r\n" ); document.write( "to be 99.5% confident that the estimate is within 2.5 of the true population mean. \r\n" ); document.write( "How large of a sample size is required? invNorm(.995) = 2.5758\r\n" ); document.write( "ME =\n" ); document.write( " |