document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=616708>Question 616708</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I would like to see an example for a question. If light bulbs have lives that are normally distibuted with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #387869 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=387869\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If light bulbs have lives that are normally distibuted with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?<BR>\n" );
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document.write( "z(2500) = (2500-2500)/500 = 0<BR>\n" );
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document.write( "Percent that have life < 2500 = P(z < 0) = 0.5000<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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