I need help. Please make sure to get the right answer Using the table “Gasoline

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I need help. Please make sure to get the right answer

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




Gasoline Sales Time Series Week Sales (000’s of gallons)




1                                                    17

2                                                    21

3                                                     19

4                                                       23

5                                                       18
6                                                       16
7                                                       20
8                                                        18
9                                                        22

10                                                        20

11                                                       15

12                                                         22

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