document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1186328>Question 1186328</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6 minutes and the variance of the waiting time is 4. Find the probability that a person will wait for between 7 and 8 minutes. Round your answer to four decimal places.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #817219 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=817219\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> variance is 4 min^2 so sd=2 min<BR>\n" );
document.write( "z=(x-mean)/sd<BR>\n" );
document.write( "z=1/2 and 1<BR>\n" );
document.write( "that probability z is between those values is 0.1499.\r<BR>\n" );
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