document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1058521>Question 1058521</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assume all samples are simple random samples.<BR>\n" );
document.write( "In a poll, 1025 randomly selected adults were surveyed and 29% said they use internet for shopping at least a few times a year. <BR>\n" );
document.write( "Find a point estimate of the percentage of adults who use the internet for shopping. <BR>\n" );
document.write( "Find a 99% confidence interval estimate of the percentage of adults who use internet for shopping<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #673593 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=673593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The CI interval width is z(0.995) sqrt{ (p*(1-p))/n}<BR>\n" );
document.write( "=2.576*sqrt{(.29*.71)/1025}<BR>\n" );
document.write( "=2.576*0.0142<BR>\n" );
document.write( "=0.0365 (rounded at end)<BR>\n" );
document.write( "The interval is (0.2535,0.3265) </SPAN>\n" );
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