document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1182835>Question 1182835</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affordable breakfast and lunch choices among the 152  Community Colleges in California.<BR>\n" );
document.write( "This week, a random, sample of 359 orders were recorded, and 178 orders were for the $5-meals.<BR>\n" );
document.write( "Find the 80% confidence interval for the true proportion of the orders for the $5-meals.\r<BR>\n" );
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document.write( "a. Answer as open-interval\r<BR>\n" );
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document.write( "b. Express the same answer as a tri-linear inequality using decimals accurate to 3 decimal places\r<BR>\n" );
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document.write( "c. Express the same answer using the point estimate and margin of error.<BR>\n" );
document.write( "Answer as decimals to 3 places </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #813550 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=813550\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p hat =178/359=0.4958<BR>\n" );
document.write( "80% half-interval is z(0.90)*sqrt(0.4958*0.5042/359); z=1.282<BR>\n" );
document.write( "=0.0338<BR>\n" );
document.write( "The interval is (0.462, 0.530)<BR>\n" );
document.write( "The interval then is 0.462 < mu < 0.530<BR>\n" );
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document.write( "0.4958+/- 0.0338 or 0.496+/- 0.034<BR>\n" );
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