document.write( "Question 860960: Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 12 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with σ = 0.20 gram.
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\n" ); document.write( "\n" ); document.write( "A.lower limit \r
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\n" ); document.write( "\n" ); document.write( "c. margin of error
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Algebra.Com's Answer #518739 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "ME = = .07 (2 decimal points
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document.write( "CI: μ-ME < u <  μ + ME
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document.write( "CI: 3.15g-ME < u <  3.15g + ME
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document.write( "CI: 3.08g < u < 3.22g
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document.write( "CI	z -value
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document.write( "80%     z= 1.2816
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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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