For your retail time series (from Exercise 3 in Section 2.10): a. Split the data into two parts using b. Check that your data have been split appropriately by producing the following plot. c....

For your retail time series (from Exercise 3 in Section 2.10):

a. Split the data into two parts using

b. Check that your data have been split appropriately by producing the following plot.

c. Calculate forecasts using snaive applied to myts.train .

d. Compare the accuracy of your forecasts against the actual values stored in myts.test .

e. Check the residuals.

Do the residuals appear to be uncorrelated and normally distributed?

f. How sensitive are the accuracy measures to the training/test split?