To be scattered or uneven; to be dispersed or show variation (e.g., scores, opinions). Can also describe intermittent/light scattered rain.
試験の点数が学年でばらついている。
Test scores are scattered across the grade (there's a lot of variation).
風で書類が机の上にばらついてしまった。
The wind scattered the papers across the desk.
午後は小雨がばらつくかもしれないから傘を持って行って。
Light scattered rain may fall in the afternoon, so take an umbrella.