document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=443722>Question 443722</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a set of data items is normally distributed with a mean of 80 and a standard deviation of 9. Convert 80 to a z-score </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #305981 by </B><A HREF=/tutors/aboutme.mpl?userid=oberobic><B>oberobic(2304)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oberobic><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=305981\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The mean has a z-score of 0.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Technically, the z-score = (score - mean) / standard deviation.<BR>\n" );
document.write( "But we do not know the standard deviation.<BR>\n" );
document.write( "For a score of 80 in this case, the numerator =  (80 - 80) = 0.<BR>\n" );
document.write( "We know that 0 divided by any number is 0, so we don't really need to know the standard deviation.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Done. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );