condition mean min max ZT0-3 294.393718 294.393718 294.393718 ZT4-7 373.8839205 373.8839205 373.8839205 ZT8-11 514.164346 514.164346 514.164346 ZT12-15 448.2167245 448.2167245 448.2167245 ZT16-19 440.457759 440.457759 440.457759 ZT20-23 412.225899 412.225899 412.225899