document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=481042>Question 481042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A doctor wants to estimate the HDL cholesterol of all 20-to 29- year-old females.  How many sunjects are needed to estimate the HDL cholesterol within 3 point with 99% confidence assumming &#963;=15.4?<BR>\n" );
document.write( "Suppose the doctor would be content  with 95% confidence.  How does thedecrease in confidence affect the sample size required?\r<BR>\n" );
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document.write( "A 99% confidences level level requires ___subjects.<BR>\n" );
document.write( "(Round up to the nearest whole number as needed.)<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #329398 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=329398\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A doctor wants to estimate the HDL cholesterol of all 20-to 29- year-old females. How many sunjects are needed to estimate the HDL cholesterol within 3 point with 99% confidence assumming &#963;=15.4?<BR>\n" );
document.write( "n = [zs/E]^2<BR>\n" );
document.write( "n = [2.5758*15.4/3]^2<BR>\n" );
document.write( "Round up to get \"n\".<BR>\n" );
document.write( "-----------------------<BR>\n" );
document.write( "Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?<BR>\n" );
document.write( "n = [1.96*15.4/3]^2<BR>\n" );
document.write( "Round up to get \"n\"<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============\r<BR>\n" );
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document.write( " <BR>\n" );
document.write( "A 99% confidences level level requires ___subjects.<BR>\n" );
document.write( "(Round up to the nearest whole number as needed.)\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );