document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1088232>Question 1088232</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A poll is conducted to estimate the proportion of students who eat regularly in the cafeteria. A sample of 275 students result in 180 who said they do eat regularly on the cafeteria. Estimate the true proportion of students who eat regularly with 95% certainty. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #702492 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=702492\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We can measure with 95% confidence, not 95% certainty.<BR>\n" );
document.write( "the proportion is 180/275=0.655<BR>\n" );
document.write( "the interval is +/-1.96*sqrt(0.655*0.345)/275)<BR>\n" );
document.write( "the sqrt factor is 0.0287<BR>\n" );
document.write( "the interval is that *1.96=0.0562<BR>\n" );
document.write( "the CI is (0.598, 0.711)<BR>\n" );
document.write( " </SPAN>\n" );
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