condition mean min max ZT0-3 67.724575 62.81905 72.6301 ZT4-7 45.433 45.433 45.433 ZT8-11 78.96074999999999 78.96074999999999 78.96074999999999 ZT12-15 0 0 0 ZT16-19 121.5175 121.5175 121.5175 ZT20-23 89.76145 89.76145 89.76145