document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=968184>Question 968184</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose the distribution of heights of a group of 300 children is normal with mean of 160 cm and a standard deviation of 15cm.  About how many of these children are less than 145cm tall? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #591677 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=591677\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose the distribution of heights of a group of 300 children is normal with mean of 160 cm and a standard deviation of 15cm. About how many of these children are less than 145cm tall?<BR>\n" );
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document.write( "z(145) = (145-160)/15 = -15/15 = -1<BR>\n" );
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document.write( "P(x < 145) = P(z < -1) = o.1587<BR>\n" );
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document.write( "Ans: 0.1587*300 is approximately 48<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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