【多选题】Let be independent normal variables each with mean 0 and variance and let a,b and c be constants. Which, if any, of the following processes are stationary?
【单选题】Let |x|= 3, if x is an odd integer; Let |x|= 6, if x is an even integer. r and s are integers, 3r is odd, and 5+5 is odd. Column A Column B |r| |s|
A.
if the quantity in Column A is greater
B.
if the quantity in Column B is greater
C.
if the two quantity are equal
D.
if the relationship cannot be determined from the information given