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R for Data Science by Dan Toomey

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Questions

Factual

  • How would you compare the results of the different models and forecasts to select the appropriate constraints?
  • In the initial plot of the river data, is there something that could be used to foresee the seasonality and/or trend immediately without breaking into components?

When, how, and why?

  • While the automated selection provided ARIMA values, how would you select the different parameters?
  • How would you decide on the different modeling techniques used for your dataset?

Challenges

  • Several of the forecasts involved negative values for the river flow. How can that be avoided?
  • Either use a time series that you have available or find one that has the components addressed in the chapter and apply the analysis available in R.

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