document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255312>Question 255312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The mean arrival rate of flights at O Hare Airport in marginal weather is 195 Flights per hour. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean arrival rate is 200 flights per hour with a standard deviation of 13 flights.\r<BR>\n" );
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document.write( "A) What is the appropriate null and alternate hypothesis to determine if there has been a significant increase in the mean number of arrivals per hour?\r<BR>\n" );
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document.write( "B) Using alpha 0.025, what is the critical value for the hypotheses test?\r<BR>\n" );
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document.write( "C) What is the test statistic for the hypothesis test? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187629 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=187629\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The mean arrival rate of flights at O Hare Airport in marginal weather is 195 Flights per hour. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean arrival rate is 200 flights per hour with a standard deviation of 13 flights. <BR>\n" );
document.write( "A) What is the appropriate null and alternate hypothesis to determine if there has been a significant increase in the mean number of arrivals per hour? <BR>\n" );
document.write( "Ho: u = 195<BR>\n" );
document.write( "Ha: u > 195<BR>\n" );
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document.write( "B) Using alpha 0.025, what is the critical value for the hypotheses test?<BR>\n" );
document.write( "Right-tail test with alpha = 2.5%: z = 1.96<BR>\n" );
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document.write( "C) What is the test statistic for the hypothesis test?<BR>\n" );
document.write( "z(200) = (200-195)/13 = 0.3846<BR>\n" );
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document.write( "Conclusion: Since the ts is not in the reject interval, do not reject Ho.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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