(a) Plot both men's and women's winning times on the same graph.
(b) Fit a linear trend model to each series. From the fitted trends, will the times eventually converge? Hint: Ask Excel for forecasts (e.g., 20 years ahead).
(c) Make a copy of your graph, and click each fitted trend and change it to a moving average trend type.
(d) Would a moving average be a reasonable approach to modeling these data sets?

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Boston Marathon Champions, 1980-2011 en Women Year Name of Winner Time Year Name of Winner Time 1980 Bill Rodgers 1981 Toshihiko Seko 1982Alberto Salazar 2:09:26 2:08:52 1980 Jacqueline Gareau 2:34:28 1981 Allison Roe 1982 Charlotte Teske 2:29:33 2:26:46 2:23:16 2:26:11 2:22:36 2:08:42 2009 Deriba Merga 2010 Robert Cheruiyot 2:05:52 2011 Geoffrey Mutai 2009 Salina Kosgei 2010 Teyba Erkesso 2011 Caroline Kilel 2:03:02