document.write( "Question 866340: How many students must be randomly selected to estimate the mean weekly earnings of students at one
\n" ); document.write( "college? We want 95% confidence that the sample mean is within $3 of the population mean, and the population standard deviation is known to be $42. \n" ); document.write( "

Algebra.Com's Answer #522251 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "  = 752.9536,  753  Students\r
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document.write( "CI	z -value
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document.write( "90%	z =1.645
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document.write( "92%	z = 1.751
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document.write( "95%	z = 1.96
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document.write( "98%	z = 2.326
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document.write( "99%	z = 2.576
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