condition mean min max ZT0-3 191.966028 191.966028 191.966028 ZT4-7 54.7394035 54.7394035 54.7394035 ZT8-11 46.3867615 46.3867615 46.3867615 ZT12-15 56.926603 56.926603 56.926603 ZT16-19 44.430323 44.430323 44.430323 ZT20-23 35.5212275 35.5212275 35.5212275