condition mean min max ZT0-3 41.806259 41.806259 41.806259 ZT4-7 47.220237 47.220237 47.220237 ZT8-11 50.0512625 50.0512625 50.0512625 ZT12-15 49.7629055 49.7629055 49.7629055 ZT16-19 67.760239 67.760239 67.760239 ZT20-23 63.47063 63.47063 63.47063