document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=268712>Question 268712</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Im stuck on this problem.\r<BR>\n" );
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document.write( "A major airline company is concerned that its proportion of late arrivals has increased from the historical level of 18%. The test the hypothesis, Ho: pie<= 0.18 vs H1: pie>.18 the airline takes a random sample of 1240 flights and finds 310 arrived late. What is the test statistic? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #196916 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=196916\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A major airline company is concerned that its proportion of late arrivals has increased from the historical level of 18%. <BR>\n" );
document.write( "The test the hypothesis, <BR>\n" );
document.write( "Ho: pie<= 0.18 <BR>\n" );
document.write( "vs H1: pie>.18 <BR>\n" );
document.write( "The airline takes a random sample of 1240 flights and finds 310 arrived late.<BR>\n" );
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document.write( "sample proportion = phat = 310/1240 = 0.25<BR>\n" );
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document.write( "What is the test statistic?<BR>\n" );
document.write( "ts = z(0.25) = (0.25-0.18)/sqrt(0.18*0.82/1240) = 0.07/0.0109 = 6.4160<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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