condition mean min max ZT0-3 0.53365416725 0.44421529 0.6230930445 ZT4-7 0.09712434575 0.0885057175 0.10574297399999999 ZT8-11 0.22713800575000004 0.11760054550000001 0.33667546600000003 ZT12-15 1.0055619755 0.7328595275 1.2782644235 ZT16-19 0.836735436 0.807032619 0.866438253 ZT20-23 1.18680585725 0.796406498 1.5772052165000001