condition mean min max ZT0-3 104.374061 104.374061 104.374061 ZT4-7 217.1775435 217.1775435 217.1775435 ZT8-11 296.94357 296.94357 296.94357 ZT12-15 252.27273250000002 252.27273250000002 252.27273250000002 ZT16-19 205.8662955 205.8662955 205.8662955 ZT20-23 150.4798325 150.4798325 150.4798325