For the random variable X in the previous question, the variance of X is

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MCQ (Single)Variance of a Random Variable

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Read the following statements and choose the correct option. (I) The correlation coefficient and the regression coefficients are of the same sign. (II) The correlation coefficient is the arithmetic mean between the regression coefficients. (III) The product of two regression coefficients is always equal to 1. (IV) Both the regression coefficients cannot be numerically greater than unity.

MCQ (Single)Variance of a Random Variable

Find the regression line of best fit from the following data. Σx = 24, Σy = 44, Σxy = 306, Σx² = 164, Σy² = 576, n = 4

TextVariance of a Random Variable