document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1057942>Question 1057942</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A recent poll of 380 randomly selected Americans showed that 24% (\r<BR>\n" );
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document.write( " = 0.24) are happy with their cell phone carriers.<BR>\n" );
document.write( "The country’s largest cell phone carrier would like to know, within a 90% confidence level, the margin of error for this poll. (90% confidence level z*-score of 1.645)<BR>\n" );
document.write( "Remember, the margin of error, E, can be determined using the formula E = z*\r<BR>\n" );
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document.write( "To the nearest tenth of a percent, the margin of error for the poll is %. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #672942 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=672942\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  A recent poll of 380 randomly selected Americans showed that 24% ( <BR>\n" );
document.write( "= 0.24) are happy with their cell phone carriers.<BR>\n" );
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document.write( "The country’s largest cell phone carrier would like to know, within a 90% confidence level, the margin of error for this poll. (90% confidence level z*-score of 1.645)<BR>\n" );
document.write( "Remember, the margin of error, E, can be determined <BR>\n" );
document.write( "using the formula E = z*sqrt(pq/n) <BR>\n" );
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document.write( "E = 1.645*sqrt[0.24*0.76/380] = 0.0360..\r<BR>\n" );
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document.write( "To the nearest tenth of a percent, <BR>\n" );
document.write( "the margin of error for the poll is 3.6%<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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