document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1147812>Question 1147812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose the lengths of the pregnanices of a certain animal are approximately normally distributed with a mean of u=161 and a standard deviation of 13 days.\r<BR>\n" );
document.write( "\n" );
document.write( "What is the probability that a randomly selected pregnancy last less than 157 days? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #769173 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=769173\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is z=(x-mean)/sd or (157-161)/13 or z< (here) 4/13<BR>\n" );
document.write( "That probability is 0.3792 using the fraction 4/13 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );