condition mean min max ZT0-3 1.2135114999999999 1.086318 1.3407049999999998 ZT4-7 1.637195 1.637195 1.637195 ZT8-11 0.9516275000000001 0.9516275000000001 0.9516275000000001 ZT12-15 0 0 0 ZT16-19 1.4679205 1.4679205 1.4679205 ZT20-23 1.612 1.612 1.612