document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=581466>Question 581466</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9.  The teacher wants to give A's to the top 10% of students and B's to the next 23%.  What is the bottom cut-off for a B grade?  Round to the nearest whole number.\r<BR>\n" );
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document.write( "My answer = 76\r<BR>\n" );
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document.write( "Thank you very much! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #371651 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=371651\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students and B's to the next 23%. What is the bottom cut-off for a B grade? Round to the nearest whole number. <BR>\n" );
document.write( "My answer = 76 <BR>\n" );
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document.write( "I get 71.5874<BR>\n" );
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document.write( "invNorm(0.57) = 0.1764<BR>\n" );
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document.write( "score = 0.1764*9+70 = 71.5874<BR>\n" );
document.write( "Round up to 72<BR>\n" );
document.write( "==================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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