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No results found for Tow samples of sizes 60 and 90 have 52 and 48 as the r

No results found for Tow samples of sizes 60 and 90 have 52 and 48 as the respective arithmetic means ,and 9 and 12 as the respective standard deviations.Find the arithmetic mean and the standard deviation of tje combaind sample of size 150.

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