condition mean min max ZT0-3 0.943597 0.730432 1.156762 ZT4-7 1.319445 1.319445 1.319445 ZT8-11 0.44162900000000005 0.44162900000000005 0.44162900000000005 ZT12-15 0 0 0 ZT16-19 0.719133 0.719133 0.719133 ZT20-23 1.297603 1.297603 1.297603