document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=286222>Question 286222</A>: <I><SPAN STYLE=\"word-break: break-all;\"> After the first exam the professor reports to the class that the mean for the exam was 73, and the standard deviation was 7.\r<BR>\n" );
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document.write( "If the bottom 10% of the class fail the exam, what score would earn a student a failing grade? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #207545 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=207545\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> After the first exam the professor reports to the class that the mean for the exam was 73, and the standard deviation was 7. <BR>\n" );
document.write( "If the bottom 10% of the class fail the exam, what score would earn a student a failing grade?<BR>\n" );
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document.write( "Find the z-value with a 10% left tail:<BR>\n" );
document.write( "invNorm(0.10) = -1.2816...<BR>\n" );
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document.write( "Find the score corresponding to that z-score:<BR>\n" );
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document.write( "x = zs+u<BR>\n" );
document.write( "x = -1.2816*7 + 73<BR>\n" );
document.write( "x = 64.029<BR>\n" );
document.write( "Scores below that fail.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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