document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=240666>Question 240666</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Last q before my exam: Football fans claim that it takes 35 minutes to get out of the stadium after a game when over 30000 fans attend the game.<BR>\n" );
document.write( "To determine if the complains are justified , a random sample of 100 fans is taken. The average time it takes these 100 fans to exit the parking is 27 minutes and sample standard deviatian is 7 minutes. <BR>\n" );
document.write( "a) Estimate the mean departe time= 27 minutes?<BR>\n" );
document.write( "b) Construct a 95% CI for the mean departure time and interpret the result?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Thx soo much for all your help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #176303 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=176303\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Football fans claim that it takes 35 minutes to get out of the stadium after a game when over 30000 fans attend the game.<BR>\n" );
document.write( "To determine if the complains are justified , a random sample of 100 fans is taken. The average time it takes these 100 fans to exit the parking is 27 minutes and sample standard deviatian is 7 minutes. <BR>\n" );
document.write( "a) Estimate the mean departe time = 27 minutes?<BR>\n" );
document.write( "b) Construct a 95% CI for the mean departure time and interpret the result?<BR>\n" );
document.write( "---------- <BR>\n" );
document.write( "sample mean: 27 min<BR>\n" );
document.write( "------<BR>\n" );
document.write( "standard error: SE = t*s/sqrt(n)<BR>\n" );
document.write( "t = invT(0.025,99) = 1.9842<BR>\n" );
document.write( "SE = 1.9842*7/sqrt(100) = 1.389<BR>\n" );
document.write( "---<BR>\n" );
document.write( "95% CI: 27-1.389 < u < 27+1.389<BR>\n" );
document.write( "95% CI: 25.61 < u < 28.389<BR>\n" );
document.write( "---------------------------------<BR>\n" );
document.write( "Meaning: We are 95% confident the mean departure time is between<BR>\n" );
document.write( "25.61 min and 28.389 min<BR>\n" );
document.write( "==================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.   </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );