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A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 439.0439.0 gram setting. Based on a 4747

A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 439.0439.0 gram setting. Based on a 4747 bag sample where the mean is 445.0445.0 grams, is there sufficient evidence at the 0.050.05 level that the bags are overfilled? Assume the standard deviation is known to be 21.021.0.

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