document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1204120>Question 1204120</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The College of Podiatrists states that  48% of women wear shoes that are too small for their feet. A researcher wants to be  98% confident that this proportion is within  0.05 of the true proportion. How large a sample is necessary?\r<BR>\n" );
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document.write( "Which answer is correct?\r<BR>\n" );
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document.write( "718, 413, 540, or 286? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #840168 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=840168\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "The sample size (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n+ ALIGN=MIDDLE  ALT=\"n+\"   DISABLED_style= \"max-width:90%; height:auto;\" >) is calculated according to the formula: \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n+=+z%5E2+%2A+p+%2A+%28%281+-+p%29+%2F+e%5E2+%29 ALIGN=MIDDLE  ALT=\"n+=+z%5E2+%2A+p+%2A+%28%281+-+p%29+%2F+e%5E2+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Where: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+2.326+ ALIGN=MIDDLE  ALT=\"z+=+2.326+\"   DISABLED_style= \"max-width:90%; height:auto;\" > for a confidence level (α) of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=98%25%2C+%7B%7B%7Bp+ ALIGN=MIDDLE  ALT=\"98%25%2C+%7B%7B%7Bp+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = proportion (expressed as a decimal), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e+ ALIGN=MIDDLE  ALT=\"e+\"   DISABLED_style= \"max-width:90%; height:auto;\" > = margin of error.\r<BR>\n" );
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document.write( "given:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=z+=+2.326+ ALIGN=MIDDLE  ALT=\"z+=+2.326+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p+=+0.48+ ALIGN=MIDDLE  ALT=\"p+=+0.48+\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e+=+0.05+ ALIGN=MIDDLE  ALT=\"e+=+0.05+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n+=+2.326%5E2+%2A+0.48+%2A+%28%281+-+0.48%29+%2F+0.05%5E2+%29 ALIGN=MIDDLE  ALT=\"n+=+2.326%5E2+%2A+0.48+%2A+%28%281+-+0.48%29+%2F+0.05%5E2+%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n+=+1.3504048896+%2F+0.0025++ ALIGN=MIDDLE  ALT=\"n+=+1.3504048896+%2F+0.0025++\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n=+540.16195584+ ALIGN=MIDDLE  ALT=\"n=+540.16195584+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The sample size is equal to <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=540+ ALIGN=MIDDLE  ALT=\"540+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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