Two methods are used to predict how many customers will call in for help in the next four days. The first method predicts the numbers of callers to be 23, 5, 14, and 20 for the four respective days. The second method predicts 20, 13, 14, and 20 for the four respective days. The actual numbers of callers turn out to be 23, 10, 15, and 19.

Which method has the smaller mean absolute error/deviation (MAD)?

1. The first method

2. The second method

3. Both methods have the same mean absolute error/ deviation (MAD)

4. Can not be determined