condition mean min max ZT0-3 799.643172 799.643172 799.643172 ZT4-7 752.807695 752.807695 752.807695 ZT8-11 712.3577925 712.3577925 712.3577925 ZT12-15 732.8555445 732.8555445 732.8555445 ZT16-19 915.1744140000001 915.1744140000001 915.1744140000001 ZT20-23 1077.4906185 1077.4906185 1077.4906185