Hi, could anyone point out the methodology I should use the answer the question below?

Your wisdom is much appreciated!

Question: "Between January and February ID 1 and 2 were influenced by an event. Based on the data below, can you determine the magnitude of the influence of this event? How significant are your results?"

Data:

January
ID | Value
1 | 50
2 | 10
3 | 20
4 | 9
5 | 11
6 | 10
7 | 10
8 | 10
9 | 10
10| 10

February
ID | Value
1 | 60
2 | 12
3 | 22
4 | 9
5 | 11
6 | 14
7 | 14
8 | 11
9 | 11
10| 11