document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1172996>Question 1172996</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A survey of daily travel time had these results (in minutes):\r<BR>\n" );
document.write( "\n" );
document.write( "The Mean is 38.8 minutes, and the Standard Deviation is 11.4 minutes.\r<BR>\n" );
document.write( "\n" );
document.write( "Find the P(X<30) and P(30<X<45). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #798335 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=798335\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> P(30) is 0. Density function probabilities involve area, and a dimensionless point will have no area.<BR>\n" );
document.write( "P(x< 30) is (30-38.8)/11.4<BR>\n" );
document.write( "=-8.8/11.4 for z or -0.77<BR>\n" );
document.write( "P( z< 0.77)=0.2201 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );