Question: For the mortality data examined in Example 2.2: (a) Add another component to the regression in (2.25) that accounts for the particulate count four weeks

For the mortality data examined in Example 2.2:

(a) Add another component to the regression in (2.25) that accounts for the particulate count four weeks prior; that is, add Pt−4 to the regression in

(2.25). State your conclusion.

(b) Draw a scatterplot matrix of Mt, Tt, Pt and Pt−4 and then calculate the pairwise correlations between the series. Compare the relationship between Mt and Pt versus Mt and Pt−4.

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