document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1192680>Question 1192680</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the minimum sample size n needed to estimate u for the given values of c, o, and E. <BR>\n" );
document.write( "c=0.90<BR>\n" );
document.write( "o=9.3<BR>\n" );
document.write( "E=2<BR>\n" );
document.write( "prelimary sample of 30 members--> n=___ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #824605 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=824605\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> error=t(0.95,df=?)*s/sqrt(n); I will use s here. <BR>\n" );
document.write( "2=1.699*9.3/sqrt(n)<BR>\n" );
document.write( "square both sides, multiply by n and divide by 4, the 2^2<BR>\n" );
document.write( "n=15.80^2/4<BR>\n" );
document.write( "=62.41, so use 63<BR>\n" );
document.write( "t(0.95, df=62) is 1.670<BR>\n" );
document.write( "2=1.67*9.3/sqrt(62)<BR>\n" );
document.write( "the right side=1.956<BR>\n" );
document.write( "try sample size 61 to see if that works. it does, with the quotient < 2.<BR>\n" );
document.write( "n=60 gives error of 2.005, sho the minimum sample size is 61.\r<BR>\n" );
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