Consider the following data set: 9, 7, 31, 26, 57, 48, 20, 5, 7 On verification, it was found that the observation 48 was incorrect and was replaced by 84. Which of the following statistical values would remain unchanged?

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)?