| Clue | Source | Date |
|---|---|---|
| Having two peaks, as a statistical distribution | ||
| With two maxima, in statistics | ||
| Kind of data distribution with two peaks | New York Times | 26 Sep 2021 |
| Like a probability distribution with two peaks | ||
| Like a probability distribution with two peaks | LA Times Daily | 11 Jul 2021 |
| Having two systems | Premier Sunday | 24 Feb 2019 |
| Like a probability curve with two peaks | New York Times | 03 Dec 2018 |
| Like a probability curve with two peaks | ||
| Having two methods | ||
| Like a distribution with two peaks | ||
| Having two systems |