document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=788781>Question 788781</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Travel Weekly International Air Transport Association survey asked business travelers about the <BR>\n" );
document.write( "purpose for their most recent business trip. 19% responded that it was for an internal company visit. <BR>\n" );
document.write( "Suppose 950 business travelers are randomly selected. <BR>\n" );
document.write( "a. What is the probability that more than 25% of the business travelers say that the reason for their <BR>\n" );
document.write( "most recent business trip was an internal company visit? <BR>\n" );
document.write( "b. What is the probability that between 15% and 20% of the business travelers say that the reason for <BR>\n" );
document.write( "their most recent business trip was an internal company visit? <BR>\n" );
document.write( "c. What is the probability that between 133 and 171 of the business travelers say that the reason for <BR>\n" );
document.write( "their most recent business trip was an internal company visit? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #478606 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=478606\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A Travel Weekly International Air Transport Association survey asked business travelers about the purpose for their most recent business trip. 19% responded that it was for an internal company visit.<BR>\n" );
document.write( "p = 0.19<BR>\n" );
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document.write( "Suppose 950 business travelers are randomly selected. <BR>\n" );
document.write( "a. What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit? <BR>\n" );
document.write( "z(0.25) = (0.25-0.19)/sqrt[0.19*0.81/950] = 1.4907<BR>\n" );
document.write( "P(p > 0.25) = P(z > 1.4907) = 0.0680<BR>\n" );
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document.write( "b. What is the probability that between 15% and 20% of the business travelers say that the reason for their most recent business trip was an internal company visit? <BR>\n" );
document.write( "Find the z-values of 20% and 15%; then find the probability between them.<BR>\n" );
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document.write( "c. What is the probability that between 133 and 171 of the business travelers say that the reason for their most recent business trip was an internal company visit?<BR>\n" );
document.write( "Find 133/950 and 171/950<BR>\n" );
document.write( "Find their z-values.<BR>\n" );
document.write( "Find the probability between them.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );