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What are the values of u- and o- for the sampling distribution of the sample mean shown? X X - - - - - -

What are the values of u- and o- for the sampling distribution of the sample mean shown? X X - - - - - - - - -- 290 340 390 A) u- = 340, 0- = 100 B) u- = 50, o- = 340 X X X X C) u- = 340, 0- = 150 D) u- = 340, 0- =50 X X X X

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