condition mean min max ZT0-3 0.518243 0.5031835 0.5333025 ZT4-7 0.323423 0.323423 0.323423 ZT8-11 0.10762150000000001 0.10762150000000001 0.10762150000000001 ZT12-15 0 0 0 ZT16-19 0.3182875 0.3182875 0.3182875 ZT20-23 0.887555 0.887555 0.887555