I sampled some data at certain sampling rate (e.g., 1 sample per minute). I want to know whether the values in this data set are continuously growing or they are just fluctuating around certain value. How can I do that?
In addition, I would like to predict the future values to be sampled. Based on the prediction (whether it will grow along with certain confidence level), I can decide whether to continue the experiment to sample more data or simply stop the experiment.
Update: I think this is exactly what I need: Trend Esitmation
Note: I know very little (if not nothing) about statistics, so bear with me and do correct me if you find me using wrong terminology.