If m and M denote the mean deviations about the mean and about the median respectively of the data: 2, 3, 5, 7, 11, 15, 20, then the mean deviation about the mean of the two-element data set {m, M} is:

In a moderately skewed distribution, if Mean = 12 and Median = 8, then using Empirical relation (Mode = 3 Median - 2 Mean), what is the value of Mode?

If 4y - 5x = 15 is the regression line of y on x and the coefficient of correlation between x and y is 0.75, what is the value of the regression coefficient of x on y (bxy)?