Question: statistics question From SOA May 1983 Part 4 Exam Q10: Advertising expenditures and sales for the last 5 quarters have been as follows: Quarter Advertising
statistics question
From SOA May 1983 Part 4 Exam Q10: Advertising expenditures and sales for the last 5 quarters
have been as follows:
Quarter Advertising Sales1 1 42 1 53 2 64 2 75 4 8
In Quarter 3, a new product was introduced that would influence sales in quarters 3, 4, and 5.
The following model is established:

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