document.write( "Question 932099: A person wants to be 90% confident and be accurate within 5% of true proportion. Please help me find minimum sample size. \n" ); document.write( "

Algebra.Com's Answer #565929 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
\n" );
document.write( "Hi
\n" );
document.write( "E = .05,  90% confident...then z = 1.645 (See Below)
\n" );
document.write( "n = [z*SD/E]^2
\n" );
document.write( "0r
\n" );
document.write( "n = p(1-p)(z/E)^2  (Depending on Info given)
\n" );
document.write( "IF no other INof Given:
\n" );
document.write( "n = .50(.50)(z/E)^2
\n" );
document.write( "Always round UP to NEXT Integer
\n" );
document.write( " CI	z = value
\n" );
document.write( "90%	z =1.645
\n" );
document.write( "92%	z = 1.751
\n" );
document.write( "95%	z = 1.96
\n" );
document.write( "98%	z = 2.326
\n" );
document.write( "99%	z = 2.576\r
\n" );
document.write( "\n" );
document.write( " \n" );
document.write( "

\n" );