condition mean min max ZT0-3 1.2122435 0.9914620000000001 1.433025 ZT4-7 0.5556490000000001 0.5556490000000001 0.5556490000000001 ZT8-11 0.396754 0.396754 0.396754 ZT12-15 0 0 0 ZT16-19 4.034135 4.034135 4.034135 ZT20-23 1.108208 1.108208 1.108208