(a) Do an additive time series model on the tornado data using years 1998 through Dec. 2018....
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(a) Do an additive time series model on the tornado data using years 1998 through Dec. 2018. The months of 2019 will be used for a holdout sample Make sure that the assumptions are valid. Interpret your coefficients and findings.
(b) Find a multiplicative model on the same data. Use the same 12 months as a holdout sample. Make sure that assumptions are valid. Interpret the coefficients and findings.
(c) Construct a table that compares the two models as to R-squares, assumptions, white noise, etc. Which model is best here and why?
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