document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=804591>Question 804591</A>: <I><SPAN STYLE=\"word-break: break-all;\"> calculate commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. what proportion of people spend less than 20 minutes commuting </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #484861 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=484861\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. What proportion of people spend less than 20 minutes commuting?<BR>\n" );
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document.write( "z(20) = (20-45)/10 = -25/10 = -2.5<BR>\n" );
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document.write( "p(x < 20 min ) = p(z < -2.5) = normalcdf(-100,-2.5) = 0.0062<BR>\n" );
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document.write( "Cheers<BR>\n" );
document.write( "Stan H.<BR>\n" );
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