Let x, y, and z be the mode, median, and range respectively of the data given below: 20, 11, 14, 8, 7, 18, 20, 27, 23, 53, 42, 15 What is the value of (2x + y - z)?

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)?