document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1068696>Question 1068696</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A company that has a large number of supermarket grocery stores claims that customers who pay by personal checks spend an average of $87 on groceries at these stores with a standard deviation of $22. Assume that the expenses incurred on groceries by all such customers at these stores are normally distributed. What percentage of customers paying by check spend between $59.94<BR>\n" );
document.write( "and $68.96 on groceries?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #683945 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=683945\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> z=(x-mean)/sd<BR>\n" );
document.write( "=(87-59.94)/22=27.06/22=1.23<BR>\n" );
document.write( "=(87-68.96)/22=18.04/22=0.82<BR>\n" );
document.write( "Want the probability z is between those two values<BR>\n" );
document.write( "p=0.0968 or 9.68% </SPAN>\n" );
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