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16 Population 1 / Population 21 141 = 12 H 2 = 10 On = 4 OR = 3 Independent random sample of 64 observation

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16 Population 1 / Population 21 141 = 12 H 2 = 10 On = 4 OR = 3 Independent random sample of 64 observation each are ghee chosen from two normal populations with the mean and standard deviation shown. Assume that x, and , denote the two sample means what is the standard deviation of the sampling distributionx, ? will

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