document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=487944>Question 487944</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20.  Use the 69-95-9.7 rule to find the following quantities:<BR>\n" );
document.write( "a. Percentage of scores less than 100<BR>\n" );
document.write( "b. Relative frequency of scores less than 120<BR>\n" );
document.write( "c. Percentage of scores less than 140<BR>\n" );
document.write( "d. Percentage of scores less than 80<BR>\n" );
document.write( "e. Relative frequency of scores less than 60<BR>\n" );
document.write( "f. Percentage of scores greater than 120 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #333228 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=333228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 69-95-97 rule to find the following quantities:<BR>\n" );
document.write( "Draw the normal curve. Put 100 in the middle and mark off the standard<BR>\n" );
document.write( "deviation scores to the left and to the right of the middle.<BR>\n" );
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document.write( "a. Percentage of scores less than 100:::0.5000<BR>\n" );
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document.write( "b. Relative frequency of scores less than 120:::69/100<BR>\n" );
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document.write( "c. Percentage of scores less than 140:::95%<BR>\n" );
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document.write( "d. Percentage of scores less than 80:::0.50-0.34.5 = 15.5%<BR>\n" );
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document.write( "e. Relative frequency of scores less than 60:::5/100<BR>\n" );
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document.write( "f. Percentage of scores greater than 120:::0.5-0.34.5 = 15.5%<BR>\n" );
document.write( "====================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );