Perform a time series analysis using the linear moving averages method

You can use this method with a time series that exhibits a trend and moving average schemes involving more than two moving averages. First, calculate and store the moving average of the original series. Then calculate and store the moving average of the previously stored column to obtain a second moving average.

To calculate and store the moving average, choose Stat > Time Series > Moving Average, complete the dialog box, choose Storage, and select Moving averages.