document.write( "Question 406179: I really need help with this question'\r
\n" ); document.write( "\n" ); document.write( "If we wish to have a 98% confidence interval, what would be the value of α /2? Show how you arrived at this answer \n" ); document.write( "

Algebra.Com's Answer #286703 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!


\n" );
document.write( "Hi
\n" );
document.write( "the 98% confidence interval is two-tailed, .01 on the right and left:
\n" );
document.write( "	α	α/2	crtical regions	
\n" );
document.write( "98%	2%	1%	z <-2.33	z >+2.33   NORMSINV(0.01)= 2.3263
\n" );
document.write( "Note graph: between the two blue lines represents 98% of the distribution
\n" );
document.write( "\r
\n" );
document.write( "\n" );
document.write( "If a population has a standard deviation σ of 25 units, what is the standard error of the mean 
\n" );
document.write( "if samples of size 16 are selected? Samples of size 36? Samples of size 100?
\n" );
document.write( "σ[M] = [25/sqrt(16)] 		
\n" );
document.write( "σ[M] = [25/sqrt(36)]
\n" );
document.write( "σ[M] = [25/sqrt(100)]  \n" );
document.write( "

\n" );