condition mean min max ZT0-3 0.2151112 0.1451464 0.285076 ZT4-7 0.11718999999999999 0.11718999999999999 0.11718999999999999 ZT8-11 0.0876951 0.0876951 0.0876951 ZT12-15 0 0 0 ZT16-19 0.3992525 0.3992525 0.3992525 ZT20-23 0.402099 0.402099 0.402099