condition mean min max ZT0-3 0.487741 0.333504 0.6419779999999999 ZT4-7 5.35311 5.35311 5.35311 ZT8-11 1.7132215 1.7132215 1.7132215 ZT12-15 0 0 0 ZT16-19 1.32926 1.32926 1.32926 ZT20-23 1.2038075 1.2038075 1.2038075