Im sorry if I post this question in Arts and not math nobody in that subject would help ;(

Consider the means of the samples shown in the table. Which value is least likely to be the mean of the population from which the samples were taken?

Sample
Sample Mean
1
15.2
2
17.1
3
16.9
4
12.2
5
18.0
6
16.3
7
17.4

12.2
15.3
16.4
17.5


Pls help fast!!