document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1033184>Question 1033184</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?<BR>\n" );
document.write( "  A. About 84% 	<BR>\n" );
document.write( "  B. About 68% 	<BR>\n" );
document.write( "  C. About 32% 	<BR>\n" );
document.write( "  D. About 16% </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #647752 by </B><A HREF=/tutors/aboutme.mpl?userid=fractalier><B>fractalier(6550)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fractalier><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=fractalier><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=647752\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Since 68% (or so) values fall in between -1 sigma and +1 sigma, that leaves 32% that are outside...that means there are 16% more than 3000 and 16% less than 2000 hours...<BR>\n" );
document.write( "Choice D. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );