condition mean min max ZT0-3 79.08233333333332 66.80785 102.30664999999999 ZT4-7 95.53205 95.53205 95.53205 ZT8-11 102.23734999999999 102.23734999999999 102.23734999999999 ZT12-15 79.906825 72.672 87.14165 ZT16-19 59.31465 59.31465 59.31465 ZT20-23 58.2809 58.2809 58.2809