document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=655395>Question 655395</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Mary receives a score of 43 on her chemistry test.  The teacher says Mary’s raw test score is equivalent to a z-score of 2.1.  Compared to her classmates, how well did Mary do? \r<BR>\n" );
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document.write( "what's the standard deviation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409085 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=409085\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Mary receives a score of 43 on her chemistry test. The teacher says Mary’s raw test score is equivalent to a z-score of 2.1. Compared to her classmates, how well did Mary do? <BR>\n" );
document.write( "what's the standard deviation?<BR>\n" );
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document.write( "All you can say from that information is that Mary's 43 is 2.1 standard<BR>\n" );
document.write( "deviations above the mean.  She did better than normalcdf(-100,2.1) = 98%<BR>\n" );
document.write( "of the class.<BR>\n" );
document.write( "The information given does not reveal the size of the standard deviation.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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