condition mean min max ZT0-3 48.73385 48.685249999999996 48.78245 ZT4-7 98.15185 98.15185 98.15185 ZT8-11 140.93900000000002 140.93900000000002 140.93900000000002 ZT12-15 0 0 0 ZT16-19 98.41265000000001 98.41265000000001 98.41265000000001 ZT20-23 81.14555 81.14555 81.14555