condition mean min max ZT0-3 0.28419900000000003 0.092847 0.47555100000000006 ZT4-7 0.18898055 0.18898055 0.18898055 ZT8-11 0.5696135 0.5696135 0.5696135 ZT12-15 0 0 0 ZT16-19 0.608209 0.608209 0.608209 ZT20-23 0.5639955000000001 0.5639955000000001 0.5639955000000001