Question: Market segments The analyst in Exercise 1 tried fitting the regression line to each market segment separately and found the following: What does this say

Market segments The analyst in Exercise 1 tried fitting the regression line to each market segment separately and found the following:

January 8000 7000 6000 5000 4000 3000 2000 1000 0 + 0

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.

January 8000 7000 6000 5000 4000 3000 2000 1000 0 + 0 1000 2000 3000 4000 5000 6000 7000 December

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