document.write( "Question 927156: When σ = 10, what sample size is needed to specify a
\n" ); document.write( "95% confidence interval of ą3 units for the mean? \n" ); document.write( "

Algebra.Com's Answer #562718 by ewatrrr(24785) $\"\"$ $\"About$

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ME = 1.96 σ /sqrt(n)
\n" ); document.write( "n = (1.96 σ /ME)^2
\n" ); document.write( "n = (1.96 (10) /3)^2 = 42.684
\n" ); document.write( " sample size $\"+highlight_green%2843%29\"$ is needed \n" ); document.write( "

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