document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1160488>Question 1160488</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The maintenance department at the main campus of a large state university receives daily requests to replace fluorecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 57 and a standard deviation of 3. Using the 68-95-99.7 rule, what is the approximate percentage of lightbulb replacement requests numbering between 51 and 57?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #783765 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=783765\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Between 51 and 57 is between -2 sd and 0 sd\r<BR>\n" );
document.write( "\n" );
document.write( "95% of the data are between -2 and +2 sd<BR>\n" );
document.write( "This is half of that, so approximately 47.5% are between those two points. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );