Mean Absolute Error and Deviation Concepts

Exploring data visualization techniques

Learning about financial forecasting

Calculating moving averages and error measures

Understanding sales trends

5 weeks

6 weeks

8 weeks

7 weeks

By averaging sales of weeks 3, 4, and 5

By averaging sales of weeks 4, 5, and 6

By averaging sales of weeks 2, 3, and 4

By averaging sales of weeks 1, 2, and 3

42

40

39

41

By dividing forecast values by actual values

By multiplying forecast values with actual values

By adding forecast values to actual values

By subtracting forecast values from actual values

-3

2

4

-5

The average of forecast values

The average of percentage errors

The average of squared errors

The average of absolute errors

4.5

6.5

3.5

5.5

By averaging the squared errors

By averaging the absolute errors

By averaging the percentage errors

By averaging the forecast values

12.5

13.5

15.5

14.5