Armed Robberies Attempts Score / 2 3. Smoothing techniques #1 Monthly time-series data on armed robberies in Boston from June 1974 to May 1975 are shown in the table and on the graph that follow. (Source: Time Series Data Library) Month Armed Robberies June 1974 287 July 355 August 460 September 364 October 487 November 452 December 391 January 1975 500 February 451 March 375 April 372 May 302 500- 450 400 350 300 Jun Jul 1974 Aug Sep Oct Nov Dec Jan Feb Mar 1975 Apr May The five-month moving average for November 1975 is Apply the exponential smoothing technique with w = 0.4. The smoothed value for November 1975 is