The intervention led to a small change in bike helmet use and a slightly larger change in seat belt use, but it did not lead to changes in alcohol variables or weapon carrying.
The intervention led to changes in 2 areas, but also did not lead to changes in 2 different areas. 
mnli hypothesis: The intervention led to changes in 2 areas, but also did not lead to changes in 2 different areas.  premise: The intervention led to a small change in bike helmet use and a slightly larger change in seat belt use, but it did not lead to changes in alcohol variables or weapon carrying.