document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=836479>Question 836479</A>: <I><SPAN STYLE=\"word-break: break-all;\"> College students average 8.7 hours of sleep per night with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9.6 hours? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #504218 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=504218\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> College students average 8.7 hours of sleep per night with a standard deviation of 40 minutes. If the amount of sleep is normally distributed, what proportion of college students sleep for more than 9.6 hours?<BR>\n" );
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document.write( "z(9.6) = (9.6-8.7)/(2/3) = 1.35<BR>\n" );
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document.write( "z(x > 9.6) = P(z > 1.35) = normalcdf(1.35,100) = 0.0885<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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