document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1080761>Question 1080761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3.	The mean and standard deviation of flight durations between two cities with SkyBlue Airlines is 1 hour and 15 minutes, and 10 minutes respectively. What is the probability that a random sample of 64 flights will have a mean of 1 hour and 18 minutes or more?                     2 MARKS<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 #694877 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=694877\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The mean and standard deviation of flight durations between two cities with SkyBlue Airlines is 1 hour and 15 minutes, and 10 minutes respectively. What is the probability that a random sample of 64 flights will have a mean of 1 hour and 18 minutes or more? <BR>\n" );
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document.write( "1 hr 18 min = 78 min<BR>\n" );
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document.write( "z(78) = (78-75)/[(10/sqrt(64)) = 3/(10/8) = 2.4<BR>\n" );
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document.write( "P(x-bar > 78) = P(z > 2.4) = normalcdf(2.4,100) = 0.0082<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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