document.write( "Question 865581: A random sample of the ages of 63 college students has a mean of 19. The population is known to be normal with a standard deviation,
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Algebra.Com's Answer #521762 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "63 college students has a mean of 19. 
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document.write( "The population is known to be normal with a standard deviation = 3
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document.write( "SE = sd/sqrt(n)= 3/sqrt(63) = .38
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document.write( "ME = 1.96*.38 = .74\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\r
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