document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=760393>Question 760393</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It has been reported that many college freshmen indicate they will major in business or a related field. A random sample of 400 incoming college freshmen was asked their preference in a major, and 95 replied that they were considering business as a major. Find the 99% confidence interval of the true proportion of incoming college freshmen who choose business or a related field as a major.   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #462609 by </B><A HREF=/tutors/aboutme.mpl?userid=reviewermath><B>reviewermath(1029)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=reviewermath><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/cgi-bin/show-face.mpl?user=reviewermath><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=462609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Q:<BR>\n" );
document.write( "It has been reported that many college freshmen indicate they will major in business or a related field. A random sample of 400 incoming college freshmen was asked their preference in a major, and 95 replied that they were considering business as a major. Find the 99% confidence interval of the true proportion of incoming college freshmen who choose business or a related field as a major. <BR>\n" );
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document.write( "A:<BR>\n" );
document.write( "For the lower limit, enter the following formula into an Excel spreadsheet:<BR>\n" );
document.write( " =95/400 + normsinv(.005)*sqrt((95/400)*(1-95/400)/400) \r<BR>\n" );
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document.write( "For the upper limit, enter the following formula into an Excel spreadsheet:<BR>\n" );
document.write( "=95/400 - normsinv(.005)*sqrt((95/400)*(1-95/400)/400) <BR>\n" );
document.write( "The 99% CI is (0.1827,0.2923)  </SPAN>\n" );
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