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Answer briefly please 4. A die with faces labelled 1, 1, 1, 2, 3, 4 is tossed four times. Let X be the number of

Answer briefly please

4. A die with faces labelled 1, 1, 1, 2, 3, 4 is tossed four times. Let X be the number of I's and Y be the number of 2's. Derive the least mean square regression line of Yon X. 17 marks]

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