Using the table Paint Sales Time Series, calculate the mean absolute deviation for a three day moving average.

Paint Sales Time Series

Week Sales (000s of gallons)

1 6

2 8

3 10

4 9

5 11

6 12

7 10

8 8

9 7

10 9

A. 2.67

B. 1.76

C. 2.54

D. 3.67