document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=271891>Question 271891</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The results of the last test in Algebra 2/Trig. class were normally distributed and had an average of 75. If the variance (&#963;2) was 25, what percent of the students taking the exam scored above an 80?\r<BR>\n" );
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document.write( "What are the step to solving a question like this using a TI-83 Plus graphing calculator? What exactly do you enter in the calculator? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #198973 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=198973\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The results of the last test in Algebra 2/Trig. class were normally distributed and had an average of 75. If the variance (&#963;2) was 25, what percent of the students taking the exam scored above an 80? <BR>\n" );
document.write( "What are the step to solving a question like this using a TI-83 Plus graphing calculator? What exactly do you enter in the calculator?<BR>\n" );
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document.write( "If sigma^2 = 25, sigma = 5<BR>\n" );
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document.write( "2nd; DIST<BR>\n" );
document.write( "normalcdf(80,100,75,5)<BR>\n" );
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document.write( "Ans: 0.1587 = 15.87%<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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