condition mean min max ZT0-3 0.44269025 0.4421295 0.443251 ZT4-7 0.7372375 0.7372375 0.7372375 ZT8-11 0.8886745 0.8886745 0.8886745 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.5838209999999999 0.5838209999999999 0.5838209999999999