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This study concentrates on fitting a time series model for paddy production in Sri Lanka. There are two main goals of time series analysis: (a) identifying the nature of the phenomenon represented by the sequence of observations, and(b)forecasting First, I plot the series and examine the main features of the graph, checking in particular if there is a trend, a seasonal component, any apparent sharp changes in behavior, or any outlying observations. Then remove the trend and seasonal component to get stationary residuals. To achieve this goal it may some times be necessary to apply a...