document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=765530>Question 765530</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please I need some help, I can't figure out how to get the right answer. I have the formula, but I can't figure out the right equation.\r<BR>\n" );
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document.write( "For a recent year, the mean fare to gly from Charlotte, NC to Seattle, WA, on a discounted ticket was $267. A random sample of round-trip discount fares on this route las month gives:\r<BR>\n" );
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document.write( "$321, $286, $290, $330, $310, $250, $270, $280, $299, $265, $291, $275, $281\r<BR>\n" );
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document.write( "At the .01 significance level, can we conclude that the mean fare has increased? what is the p-value?\r<BR>\n" );
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document.write( "This is what I have:\r<BR>\n" );
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document.write( "Z (sub a/2) equals (x-mu)/stnd dev<BR>\n" );
document.write( "H0:mu equeals $267<BR>\n" );
document.write( "Ha:mu equals < $267 (1-tailed test)<BR>\n" );
document.write( "a equals 0.01\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #466252 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=466252\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For a recent year, the mean fare to gly from Charlotte, NC to Seattle, WA, on a discounted ticket was $267. A random sample of round-trip discount fares on this route las month gives: <BR>\n" );
document.write( "$321, $286, $290, $330, $310, $250, $270, $280, $299, $265, $291, $275, $281 <BR>\n" );
document.write( "At the .01 significance level, can we conclude that the mean fare has increased? what is the p-value?<BR>\n" );
document.write( "alpha = 1%<BR>\n" );
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document.write( "This is what I have: <BR>\n" );
document.write( "H0:mu = $267<BR>\n" );
document.write( "Ha:mu > $267 (claim)<BR>\n" );
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document.write( "sample mean = x-bar = 288.3<BR>\n" );
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document.write( "test stat: t(288.3) = (288.3-267)/[22.5/sqrt(13)] = 3.4133<BR>\n" );
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document.write( "p-value = P(t > 3.4133 when df = 12) = tcdf(3.4133,100,12) = 0.0026<BR>\n" );
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document.write( "Since the p-value is less than 1%, reject Ho.<BR>\n" );
document.write( "The test results support the claim.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "===================== </SPAN>\n" );
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