document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=825323>Question 825323</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 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. Supposed 950 travelers were 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( "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? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #497304 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=497304\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 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. Supposed 950 travelers were 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] = 4.7140<BR>\n" );
document.write( "P(p-hat>0.25) = P(z > 4.7140) = 0.00000122<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( "z(0.15) = (0.15-0.19)/sqrt[0.19*0.81/950] = -3.9284<BR>\n" );
document.write( "z(0.20) = (0.20-0.19)/sqrt[0.19*0.81/950] = 0.7857<BR>\n" );
document.write( "P(0.15< p-hat <0.20) <BR>\n" );
document.write( "= P(-3.9284< z <0.7857) <BR>\n" );
document.write( "= normalcdf(-3.9284,0.7857) <BR>\n" );
document.write( "= 0.7839<BR>\n" );
document.write( "=============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );