document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=142080>Question 142080</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Please help with this problem.<BR>\n" );
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document.write( " A first year Calculus class test gave the following information: Mean of 63 and a Standard Deviation of 12.  Answer the questions:\r<BR>\n" );
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document.write( "A. If 800 took the test how many passes with a 51% or higher?\r<BR>\n" );
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document.write( "b. What is the standard score of 39%?\r<BR>\n" );
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document.write( "C. If a student got and 82%, what is the standard score? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #103501 by </B><A HREF=/tutors/aboutme.mpl?userid=nabla><B>nabla(475)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nabla><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=103501\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a. 63-51=12  (1 standard deviation below the mean). This is asking for 50%+34%=84% of the tests. .84*800=672. In words, it was asking for the amount of tests scoring higher than 1 standard deviation below the mean.\r<BR>\n" );
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document.write( "b. z=(39-63)/12=-2. The score lies precisely 2 standard deviations below the mean.\r<BR>\n" );
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document.write( "c. z=(82-63)/12=1.58333... </SPAN>\n" );
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