document.write( "Question 628189: the length of pregnancies of humans are normally distributed with a mean of 268 days and a standard deviation of 15 days. find the probabilty of a pregnancy lasting less than 250 days. the answer should be 0.1151. but i dont know how she got it. \n" ); document.write( "

Algebra.Com's Answer #395453 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
\n" );
document.write( "Hi, Re TY, sry on the typo, NORMSDIST(-1.2) = .1151, NORMSDIST is the Excel fucntion used here to detemine the Probability.  
\n" );
document.write( "ONe may use a Calculator or z - table to find the Accumulative Probabilities to the left of a particular z-score
\n" );
document.write( "the length of pregnancies of humans are normally distributed with a = 268 days and  = 15 days.
\n" );
document.write( "*Note: 
\n" );
document.write( " P (x < 250) = P ( = -1.2)   Excel function: NORMSDIST(-1.2) = .1151
\n" );
document.write( " 
\n" );
document.write( " 
\n" );
document.write( " \n" );
document.write( "

\n" );