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19. (10 points) Sample A and sample B are selected from a population. The sample statistics are shown below: Size Mean Standard Deviation Sample A

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19. (10 points) Sample A and sample B are selected from a population. The sample statistics are shown below: Size Mean Standard Deviation Sample A 3 10 2 Sample B 5 8 3 Suppose we put samples A and B together to form a sample C of size 8. Find the mean and standard deviation of sample C

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