If the mean and variance of a Time Series is constant over time , it is called a _____________ Time Series. Q & A › Category: Time Series › If the mean and variance of a Time Series is constant over time , it is called a _____________ Time Series. 0 Vote Up Vote Down Admin Staff asked 3 years ago If the mean and variance of a Time Series is constant over time , it is called a _____________ Time Series. a) Constant b) Stable c) Stationary d) Fixed Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading... 1 Answers 0 Vote Up Vote Down Admin Staff answered 3 years ago c) Stationary Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading...