condition mean min max ZT0-3 0.3317805 0.164292 0.49926899999999996 ZT4-7 0.4154515 0.4154515 0.4154515 ZT8-11 0.7452380000000001 0.7452380000000001 0.7452380000000001 ZT12-15 0 0 0 ZT16-19 0.6546970000000001 0.6546970000000001 0.6546970000000001 ZT20-23 0.8224935 0.8224935 0.8224935