Consider a finite sequence of random values X = { x1, x2,..., xn}. Let μx be the mean and σx be the standard deviation of X. Let another finite sequence Y of equal length be derived from this as yi = a*xi + b, where a and b are positive constants. Let μy be the mean and σy be the standard deviation of this sequence. Which one of the following statements is INCORRECT?

• A. Index position of mode of X in X is the same as the index position of mode of Y in Y
• B. Index position of median of X in X is the same as the index position of median of Y in Y.
• C. μy = aμx+b
• D. σy = aσx+b