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3. Chapter 5, problem 20 (8th edition and 9th edition). (4pts). Calculate average and standard deviation for grouped data as follows. The data is listed

3. Chapter 5, problem 20 (8th edition and 9th edition). (4pts). Calculate average and standard deviation for grouped data as follows. The data is listed in problem 20 in chapter 4. Please show your work step by step. Weight of 65 castings in kilograms FREQUENCY CELL MIDPOINT 3.5 3.8 4.1 4.4 4.7 6 9 18 14 13 5 5.0

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