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    Question

    Two random variables x and y have the following

    regression equations - 3x + 2y – 26 = 0 6x + y – 31 = 0 then, the mean values of x and y are respectively:
    A 7, 4 Correct Answer Incorrect Answer
    B 6, 4 Correct Answer Incorrect Answer
    C 4, 7 Correct Answer Incorrect Answer
    D 4, 6 Correct Answer Incorrect Answer

    Solution

    3x + 2y – 26 = 0 6x + y – 31 = 0 The means of X and Y will satisfy the above two equations. So, solving the above two equations we get, Xbar = 4 Ybar = 7

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