what is the long term level in rv what is the long term level? what is the level of a time series which term relates to a local level in a time series? what is the definition of rv levels what is meant by the level of a time series? what is meant by the level of a time series what is the meaning of x_t what is the long term level of a time series? what is the level of a time series what is meant by the level of a time series? difference between local and long-term level what is meant by the level of a time series? what is the mean level of time for the time sequence what's the definition for long term level which is meant by the local level of a time series what is meant by the level of time series what is meant by the long term level? what is the difference between an rv and a long term level? definition fc$