document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=903414>Question 903414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If in an online processing web based application  200 users who had to load a file had a mean time of 120 secs in loading a file with a standard deviation of 10 secs, then the worst case (ie “lowest” ) estimate for the  number of users who have waited for more than 100 secs but less than 140 secs is  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #547977 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=547977\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If in an online processing web based application 200 users who had to load a file had a mean time of 120 secs in loading a file with a standard deviation of 10 secs, then the worst case (ie “lowest” ) estimate for the number of users who have waited for more than 100 secs but less than 140 secs is <BR>\n" );
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document.write( "z(100) = (100-120)/10 = -2<BR>\n" );
document.write( "z(140) = (140-120)/10 = 2<BR>\n" );
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document.write( "P(100<= x <=140) = P(-2<= z <=2) = normalcdf(-2,2) = 0.9545<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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