what is second-order stationarity which is the best definition of stationary process? what is a second order stationary model define second order stationarity what is the second order stationary process what is a second order stationary process what is the definition of a second order stationary process what is second or third order stationarity second definition stationarity what is the second order stationary process definition of second order stationary which is the second order stationary process in which each process is a linear model? and who created a deterministic component? what is a stationary process what is second order stationary second order stationarity definition second order stationary process definition second order stationary processes definition what is the second order stationary process in ttd second order stationary processes definition what is a second order stationary process