Is singular or plural correct in this case?
We believe that 30 subjects put us comfortably above the field’s average for similar studies.
We believe that 30 subjects puts us comfortably above the field’s average for similar studies.
I initially thought it must be plural (as the 30 subjects are plural) but I am not sure if this is correct given that it is rather short for something like "testing 30 subjects puts us (...)". I am not sure which one sounds more correct to a native speaker.