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If X1, X2, . . ., X100 are i.i.d. Nor (300, 500), then what is the distribution of the sample mean X? O Nor(3, 0.05)

If X1, X2, . . ., X100 are i.i.d. Nor (300, 500), then what is the distribution of the sample mean X? O Nor(3, 0.05) O Nor(3, 5) O Nor(3, 500) O Nor(300, 0.05) O Nor(300, 5)

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