Question

why is it important to plot time serious data?

Answer 1

Assuming that the question means 'Time Series' data. Time series data is the data for a particular variable over a period of time. For example, you may have data for GDP of India for fifteen or twenty years. Time Series data is used to uncover trends or to analyze the time path of the variable and hence it becomes easier to visualize this data when one plots it. For example we can check for the stationarity of the series or whether there is autocorrelation in the values just by plotting the data on a time scale.