document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=959417>Question 959417</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A recent poll pertaining to educational reforms involved 634 men and 820 women. The margin of error is 3.6% for the male sample and 3.2% for the female sample. Find the level of confidence for the male portion of the poll and for the female portion of the poll. HINT: See Example 7. (Round your answers to one decimal place.)\r<BR>\n" );
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document.write( "a) male    	  %\r<BR>\n" );
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document.write( "b) female    	  %<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 #586450 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=586450\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A recent poll pertaining to educational reforms involved 634 men and 820 women. The margin of error is 3.6% for the male sample and 3.2% for the female sample. Find the level of confidence for the male portion of the poll and for the female portion of the poll. HINT: See Example 7. (Round your answers to one decimal place.)<BR>\n" );
document.write( " a) male %<BR>\n" );
document.write( "ME = z*sqrt[pq/n]<BR>\n" );
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document.write( "0.036 = z*sqrt[(1/2)(1/2)/634] <BR>\n" );
document.write( "0.036 = z(1/2)(1/25.18]<BR>\n" );
document.write( "z/2 = 25.18*0.036<BR>\n" );
document.write( "z = 1.81<BR>\n" );
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document.write( "normalcdf(1.81,100) = 0.035<BR>\n" );
document.write( "level of confidence = 2*3.5 = 7%<BR>\n" );
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document.write( "b) female %<BR>\n" );
document.write( "z*(1/2)[1/sqrt(820)] = 0.032<BR>\n" );
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document.write( "z*(1/2)[1/28.64] = 0.032<BR>\n" );
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document.write( "z = 0.032*2*28.64 = 1.84<BR>\n" );
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document.write( "normalcdf(1.84,100) = 0.033<BR>\n" );
document.write( "level of confidence = 2*3.3% = 6.6%<BR>\n" );
document.write( "==========<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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