document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1138315>Question 1138315</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 99.7% of the scores on an exam are between 60 and 98 points. Assuming the data is normally distributed, what are the mean and standard deviation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #756145 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=756145\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 99.7% is +/- 3 sd<BR>\n" );
document.write( "The mean is half the sum of 60 and 98 or 79<BR>\n" );
document.write( "The difference between 60 and 79 and 79 and 98 is 19<BR>\n" );
document.write( "each of those is 3 sd<BR>\n" );
document.write( "so the sd is 19/3<BR>\n" );
document.write( "N (69, 19/3) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );