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Mean Absolute Deviation

  • #1
I understand MAD, but I cannot figure out this question. Here's the information.

Daily high temperatures in St. Louis for the last week were as follows: 92, 91, 94, 95, 96, 88,90.
The mean absolute deviation based on a 2-day moving average = 3.20

How in the world is it 3.20? I've tried 100's of combinations to try to repeat this answer, but I can't do it. I'm 100% sure this is the correct answer. Can anyone please show me a step by step walk through on this problem? I've spent all day on this... I know it has to be simple.
 

Answers and Replies

  • #2
1,137
0
I'm getting 4.2 :mad:

How you did the problem?
 
  • #3
I got it! I finally got some help that really explained what 2-day moving average means. This is a forecasting problem.

Numbers - 92, 91, 94, 95, 96, 88,90
2-Day Averages - 91.5, 92.5, 94.5, 95.5, 92
Absolute Error - 2.5, 2.5, 1.5, 7.5, 2
MAD = 3.2
 

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