document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1041828>Question 1041828</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A poll asked people to name the most serious problem facing the country. forty-three percent of the 900 randomly selected people said crime. What is the margin of error? Round to four decimal places. <BR>\n" );
document.write( "A.) 0.0165<BR>\n" );
document.write( "B.) 0.0330<BR>\n" );
document.write( "C.) 0.0261<BR>\n" );
document.write( "D.) 0.0523 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #656809 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=656809\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assuming a 95% confidence interval, the critical z value is z = 1.96 which rounds to 2\r<BR>\n" );
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document.write( "z = 2<BR>\n" );
document.write( "phat = 0.43<BR>\n" );
document.write( "1-phat = 1-0.43 = 0.57<BR>\n" );
document.write( "n = 900\r<BR>\n" );
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document.write( "margin of error = z*sqrt(phat*(1-phat)/n)<BR>\n" );
document.write( "margin of error = 2*sqrt(0.43*0.57/900)<BR>\n" );
document.write( "margin of error = 0.03300505011863<BR>\n" );
document.write( "margin of error = 0.0330\r<BR>\n" );
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document.write( "The final answer is choice B) 0.0330 </SPAN>\n" );
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