The Flatline Test

The Flatline Test is a method used in data analysis to determine if a data series or signal is essentially steady over time. It involves checking whether the data remains constant or close to constant, with minimal variation. If the data stays flat, or flatline, the test confirms that no significant changes are occurring. This helps identify periods of stability or silence in signals, such as in medical heart monitoring or monitoring machine output. Essentially, it’s a way to verify that no meaningful activity or variation exists in the data during a specific interval.