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3. The following table shows the number of cars sold by a dealership in the past 6 weeks. Week Sales 1 20 2 24 3

3. The following table shows the number of cars sold by a dealership in the past 6 weeks.

Week Sales

1 20 2 24 3 22 4 26 5 21 6 22

a. Use a 4-week moving average predict sales for the 7th week.

b. How does this MA differ from the average of all the 6 weeks?

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