The masses of 8 nominally identical items were determined to be 4.23 g, 4.37 g, 3.98 g, 4.75 g, 4.12 g, 4.45 g, 4.71 g, and 3.35 g. What are the mean and standard deviation of the masses?

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The masses of 8 nominally identical items were determined to be 4.23 g, 4.37 g, 3.98 g, 4.75 g, 4.12 g, 4.45 g, 4.71 g, and 3.35 g. What are the mean and standard deviation of the masses?





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