document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=923655>Question 923655</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 90 percent confidence level and state that the estimated proportion must be within 2 percent of the population proportion. A pilot survey reveals that 5 of the 48 sampled hold two or more jobs.\r<BR>\n" );
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document.write( "How many in the workforce should be interviewed to meet your requirements? (Round up your answer to the next whole number.)<BR>\n" );
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document.write( "  Number of persons to be interviewed    <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 #560226 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=560226\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 90 percent confidence level and state that the estimated proportion must be within 2 percent of the population proportion. A pilot survey reveals that 5 of the 48 sampled hold two or more jobs.<BR>\n" );
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document.write( "How many in the workforce should be interviewed to meet your requirements? (Round up your answer to the next whole number.)<BR>\n" );
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document.write( "Formula::<BR>\n" );
document.write( "Since E = z*s/sqrt(n)<BR>\n" );
document.write( "E = z*sqrt(pq/n)<BR>\n" );
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document.write( "n = [z/E]^2*pq<BR>\n" );
document.write( "n = [1.645/0.02]^2*(5/48)(41/48)<BR>\n" );
document.write( "n = 602 when rounded up<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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