document.write( "Question 659394: if the population standard deviation is 8, how large a sample is necessary to have a standard error that is less than or equal to 4 points \n" ); document.write( "
Algebra.Com's Answer #410839 by stanbon(75887)\"\" \"About 
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if the population standard deviation is 8, how large a sample is necessary to have a standard error that is less than or equal to 4 points
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\n" ); document.write( "std of sample means = 8/sqrt(n) <= 4
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\n" ); document.write( "sqrt(n) >= 8/4
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\n" ); document.write( "sqrt(n) >= 2
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\n" ); document.write( "n >= 4
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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