document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=251238>Question 251238</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A teacher gives a test and gets normally distributed results with a mean of 50 and a standard deviation of 10. If the top 10% will receive an A and the bottom 10% will receive an F, find the minimum score for a letter grade of A and the maximum score fo the letter grade of F.\r<BR>\n" );
document.write( "\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 #184323 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=184323\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean is 50.<BR>\n" );
document.write( "Standard Deviation is 10.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Top 10% get an A.<BR>\n" );
document.write( "Bottom 10% get an F.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Based on normal distribution, you can use the Z-Table Calculator to find the percentages of the population that fall under each category.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Any score below 37.1845 will get an F.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Any score above 62.8155 will get an A.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Select the following link to access the z-table calculator.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "<a  rel=nofollow HREF= \"http://davidmlane.com/hyperstat/z_table.html\" target = \"_blank\">http://davidmlane.com/hyperstat/z_table.html</a>\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "you select the bottom graph.<BR>\n" );
document.write( "enter a mean of 50<BR>\n" );
document.write( "enter a standard deviation of 10<BR>\n" );
document.write( "enter a shaded area of .1<BR>\n" );
document.write( "select below to get the bottom 10%<BR>\n" );
document.write( "select above to get the top 10%\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "the graph will show you the area you picked.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );