document.write( "Question 1186844: The length of a human pregnancy is normally distributed with a mean of 272 days with a standard deviation of 9 days (Bhat & Kushtagi, 2006). How many days would a pregnancy last for the shortest 20%? Round answer to 2 decimal places. Answer: \n" ); document.write( "

Algebra.Com's Answer #849357 by ikleyn(52788) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "The length of a human pregnancy is normally distributed with a mean of 272 days with a standard deviation
\n" ); document.write( "of 9 days (Bhat & Kushtagi, 2006). How many days would a pregnancy last for the shortest 20%? Round answer to 2 decimal places.
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "You are given a normal curve with the mean value of 272 days and the standard deviation of 9 days.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "They want you find a raw mark t (days) such that 20%, or 0.2 of the area under the normal curve\r\n" );
document.write( "\r\n" );
document.write( "be on the left of the mark t.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Use a standard function invNorm in your calculator TI-83/84\r\n" );
document.write( "\r\n" );
document.write( "                area  mean  SD    <<<---===  formatting pattern\r\n" );
document.write( "    t = invNorm(0.2,  272,   9)\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "and get the ANSWER  t = 264.43  days.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );