document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=976643>Question 976643</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9.\r<BR>\n" );
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document.write( "What are the two dollar amounts, equidistant from the mean of $30, such that 90% of all customer purchases are between these values?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #598184 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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/cgi-bin/show-face.mpl?user=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=598184\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> I want to find the z score that equated to 45%.\r<BR>\n" );
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document.write( "Z=1.64 \r<BR>\n" );
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document.write( "1.64*9 = $14.76\r<BR>\n" );
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document.write( "90% of purchases are between $15.24 and $44.76 </SPAN>\n" );
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