condition mean min max ZT0-3 1149.399931 1149.399931 1149.399931 ZT4-7 1084.348988 1084.348988 1084.348988 ZT8-11 1190.715449 1190.715449 1190.715449 ZT12-15 1295.4471644999999 1295.4471644999999 1295.4471644999999 ZT16-19 2127.7580235 2127.7580235 2127.7580235 ZT20-23 2735.833849 2735.833849 2735.833849