Does this imply that I am ineligible to apply for this grant?
It’s hard to say for sure, but at larger granting agencies, different review panels may focus on different areas and have quite stringent guidelines for what is considered on-topic. It may be that you need to have a statistical test as part of the guidelines for the area under which you asked your proposal to be judged. The reviewer’s response may be suggesting your submission falls out of their purview.