document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=346733>Question 346733</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If it was known that a population of 1000 parts has a standard deviation of 0.02 seconds, what size sample would be required to maintain an error no greater than 0.005 seconds with a confident level of 95%? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #248045 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=248045\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If it was known that a population of 1000 parts has a standard deviation of 0.02 seconds, what size sample would be required to maintain an error no greater than 0.005 seconds with a confident level of 95%?<BR>\n" );
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document.write( "sqrt(n) = z*s/E<BR>\n" );
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document.write( "n = [z*s/E]^2<BR>\n" );
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document.write( "n = [1.96*0.02/0.005]^2<BR>\n" );
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document.write( "n = [7.84]^2<BR>\n" );
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document.write( "n = 61.47<BR>\n" );
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document.write( "Round up to n = 62<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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