document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1054503>Question 1054503</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 91 adults selected randomly from a town,61 have health insurance.  Find the 90% confidence interval for the true proportion of all adults in the town who have onsurance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #669741 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=669741\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  91 adults selected randomly from a town,61 have health insurance. Find the 90% confidence interval for the true proportion of all adults in the town who have insurance. <BR>\n" );
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document.write( "sample proportion = p-hat = 61/91 = 0.67<BR>\n" );
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document.write( "ME = z*sqrt(p*q/n) =  1.645*sqrt(0.67*0.33/91) = 1.645*0.05 = 0.08<BR>\n" );
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document.write( "90% CI:: 0.67-0.08 < p < 0.67+0.08<BR>\n" );
document.write( "90% CI:: 0.59 < p < 0.75<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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