Recruit 4 was the best performing recruit within the group.
However, there is no statistically significant difference between the recruits (as indicated by the data for Rows)
There is however, a statistically significant difference between the scores of the three tests.
Looking at the test means, we can see that the Rifle Qualification's scores is much lower than the other two.
Thus, either the Rifle Qualification is too hard, or the recruits are better suited to be Life Guards rather than Marines.