condition mean min max ZT0-3 0.3411548333333333 0.0 0.768125 ZT4-7 0.398902 0.398902 0.398902 ZT8-11 0.80456 0.80456 0.80456 ZT12-15 0.9732175000000001 0.677885 1.26855 ZT16-19 1.50048 1.50048 1.50048 ZT20-23 0.0 0.0 0.0