condition mean min max ZT0-3 0.625383 0.38870150000000003 0.8620645 ZT4-7 0.7834055 0.7834055 0.7834055 ZT8-11 0.827566 0.827566 0.827566 ZT12-15 0 0 0 ZT16-19 1.432186 1.432186 1.432186 ZT20-23 0.9112115000000001 0.9112115000000001 0.9112115000000001