what is stl decomposition what is stl decomposition what is the difference between stl decomposition and seasonality of time series what is the difference between outlier and regular how to find outlier when should a time sequence be preprocessed should i pre process time series data? what data type is the trend in a time series? how to find outlier patterns in time series should i preprocess sales data what does stl decompose do in a time series what do you do for an outlier in a time series what is the best way to detect outliers? how to find outliers in time series what would show up when a time series is non generic can you detect outliers with stl what is outliers detection of time series when to use stl decomposition on a time series how do you detect outliers in a time series what is stl in sales