|  | Ljung-Box Test | |
---|---|---|---|
Year | Time series | Q-statistic | P-value |
2001 | ED | 11.72 | 0.07 |
 | Laboratory model | 8.29 | 0.22 |
2002 | ED | 14.60 | 0.02* |
 | Laboratory | 5.26 | 0.51 |
2003 | ED | 4.36 | 0.63 |
 | Laboratory | 6.16 | 0.41 |
2004 | ED | 3.25 | 0.78 |
 | Laboratory | 4.25 | 0.64 |
2005 | ED | 3.25 | 0.78 |
 | Laboratory | 13.71 | 0.03* |
2001 to 2005 | ED | 11.72 | 0.16 |
 | Laboratory | 13.58 | 0.09 |