document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1176585>Question 1176585</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Surveyors asked a random sample of women in a major city what factor was the most important in deciding where to shop. The results appear in the following table. If the sample size was 1200, estimate with 95% confidence the proportion of women who identified price and value as the most important factor.\r<BR>\n" );
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document.write( "Factor Percentage (%)\r<BR>\n" );
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document.write( "Price and Value 40<BR>\n" );
document.write( "Quality and selection of merchandise 30<BR>\n" );
document.write( "Service 15<BR>\n" );
document.write( "Shopping environment 15 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #803819 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=803819\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> price and value is 40% of the total (I misread the question)<BR>\n" );
document.write( "95%CI half-interval is z*sqrt(p*(1-p)/n)<BR>\n" );
document.write( "=1.96*sqrt(..4*.6/1200)<BR>\n" );
document.write( "=0.0277<BR>\n" );
document.write( "95%CI is (0.3723, 0.4277) units % </SPAN>\n" );
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