document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1032019>Question 1032019</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The mean and standard deviation of 500 students who took a statistics final were 72 and 8, respectively. The grades have a mound-shape distribution. Based upon this information, the best estimate of the percentage of students who scored higher than 80 on the exam is \r<BR>\n" );
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document.write( "A	68%<BR>\n" );
document.write( "B	32%<BR>\n" );
document.write( "C	16%<BR>\n" );
document.write( "D	5%<BR>\n" );
document.write( "E	2.5% </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #646723 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=646723\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The mean and standard deviation of 500 students who took a statistics final were 72 and 8, respectively. The grades have a mound-shape distribution. Based upon this information, the best estimate of the percentage of students who scored higher than 80 on the exam is<BR>\n" );
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document.write( "(80-72)/8 = 1<BR>\n" );
document.write( "That means a score of 80 is one standard deviation above the mean><BR>\n" );
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document.write( "Since 68% of the data is within 1 standard deviation of the mean,<BR>\n" );
document.write( "34% is within 1 std to the right of the mean.<BR>\n" );
document.write( "So 50% - 34% = 16% of the scores are higher than 80<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "A	68%<BR>\n" );
document.write( "B	32%<BR>\n" );
document.write( "C	16%<BR>\n" );
document.write( "D	5%<BR>\n" );
document.write( "E       2.5%  </SPAN>\n" );
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