condition mean min max ZT0-3 32.957625 30.9556 34.959649999999996 ZT4-7 35.14045 35.14045 35.14045 ZT8-11 39.3423 39.3423 39.3423 ZT12-15 0 0 0 ZT16-19 34.6038 34.6038 34.6038 ZT20-23 40.883750000000006 40.883750000000006 40.883750000000006