which condition has the potential for stationarity what is weak form of stationarity what is the difference between stationarity and nonstationary define stationarity in economics which type of stationarity requires constant mean what is stationarity which of the statements would describe the importance of stationarity? which is an example of stationary process? what is stationarity and how to explain it what is stationarily what is stationarity which statement describes a stationary process? which term is used to describe a stationary process that requires constant variance? how is stationary process different from nonstationary process where does covariance vary in a time series what is the difference between stationary and nonstationary process what is stationarity stationarity is also known as when a time series has a constant mean and is nonstationary which statement best describes the term stationary process?