document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=909978>Question 909978</A>: <I><SPAN STYLE=\"word-break: break-all;\">  (i).The length of human pregnancies from conception to birth approximates a normal distribution with a mean of 266 days and a variance of 256 days. What proportion of all pregnancies will last between 240 days and 270 days (roughly between 8 and 9 months)? Draw a normal curve to illustrate your probability.\r<BR>\n" );
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document.write( "(ii). What length of time marks the shortest 70% of all pregnancies? Draw a normal curve to illustrate your probability. <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #552164 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=552164\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> m = 266, sd = 16<BR>\n" );
document.write( "I) normalcdf(240,270,266,16)<BR>\n" );
document.write( "ii)z = inv Norm(.30) = (X-266)/16<BR>\n" );
document.write( "16invNorm(.30) + 266  = X  </SPAN>\n" );
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