document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=438819>Question 438819</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The manager of a local gym has determined that the length of time members spend at the gym is a normally distributed variable with a mean of 80 minutes and a standard deviation of 20 minutes.\r<BR>\n" );
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document.write( "What proportion of members spend between 80 and 100 minutes at the gym? Use the standard normal distribution tables on p564 of your Wegner textbook. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #303356 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=303356\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  The manager of a local gym has determined that the length of time members spend at the gym is a normally distributed variable with a mean of 80 minutes and a standard deviation of 20 minutes. <BR>\n" );
document.write( "What proportion of members spend between 80 and 100 minutes at the gym?<BR>\n" );
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document.write( "z(80) = 0<BR>\n" );
document.write( "z(100) = (100-80)/20 = 1<BR>\n" );
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document.write( "P(80<= x <= 100) = P(0<= z <=1) = 0.3413<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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