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A tree produces apples weighting 0.452 pounds on average with a standard deviation being 0.07 pounds. It is thought that the mean has changed but

A tree produces apples weighting 0.452 pounds on average with a standard deviation being 0.07 pounds. It is thought that the mean has changed but the standard deviation has remained the same. How many apples should be tested to be able to estimate the new meanby the sample meanwith maximum error of estimate 0.006 pounds and a 90% level of confidence?

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