Question: 1. compute the centered moving average and seaonal ratios (each month is a season IE like a quarter, so 12 seasons) Monthly Revenue ($1,000s) MONTH

Monthly Revenue ($1,000s) MONTH 2011 2012 2013 438 444 450 January February 420 425 438 March 414 423 434 318 331 338 April May 306 318 331 June 240 245 254 240 255 264 July August September 216 223 231 198 210 224 October 225 233 243 November 270 278 289 December 322 315 335
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