Nonstationary Time Series Analysis and Case Study Based on SAS
Guangrong Liu · Journal of Shantou University · 2010
Seasonal index trend method is used to analyze the nonstationary time series with the seasonal variation(a co mputer company’s actual quarterly sales record) by the statistical analysis system,and its sales in 2009 is forecasted.Up to now,compared with the actual sales data of the year in the first three quarters,the fitting results are satisfactory,and the method is shown to be practical and effective.