The free hand curve method is a simple graphical technique used in time series analysis to identify the trend component of data over time. In this method, a smooth curve is drawn manually through a time series graph to capture the general direction or pattern of the data, such as an upward, downward, or stable trend. It does not involve any mathematical calculations, making it easy to use but subjective in nature. The accuracy of the trend line depends on the skill and judgment of the person drawing it. This method is useful for visualizing trends in historical data, especially when quick, intuitive insights are needed. However, it is less reliable for precise forecasting due to its lack of objectivity and reproducibility.
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