condition mean min max ZT0-3 6.34788 3.242285 9.453475000000001 ZT4-7 0.591737 0.591737 0.591737 ZT8-11 0.1460025 0.1460025 0.1460025 ZT12-15 0 0 0 ZT16-19 0.43595700000000004 0.43595700000000004 0.43595700000000004 ZT20-23 0.437253 0.437253 0.437253