Question: The analyst in Exercise tried fitting the regression line to each market segment separately and found the following: What does this say about her concern

The analyst in Exercise tried fitting the regression line to each market segment separately and found the following:

What does this say about her concern in Exercise 1? Was she justified in worrying that the overall model Jan = $612.07 + 0.403 Dec might not accurately summarize the relationship? Explain briefly.

8000 7000 6000 5000 4000 3000 2000 1000 0 1000 2000 300 4000 6000 7000 December

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