Job training had a positive effect on the Group 1 and it would be beneficial for the second group to have had it too.
Step-by-step explanation:
In series analysis one compares two set of data in terms of their initial points and their final results and within if there are fluctuations in the matter during the series. In ere, the data given is of two points that is the initial data and the final data.
The two data points clearly show that the two groups were equivalent in 2003 but the first group which received job raining ended up progressing more than the second group so it is beneficial to get the job training that was offered.