condition mean min max ZT0-3 48.046875 44.822050000000004 51.271699999999996 ZT4-7 48.41345 48.41345 48.41345 ZT8-11 64.85560000000001 64.85560000000001 64.85560000000001 ZT12-15 0 0 0 ZT16-19 68.9086 68.9086 68.9086 ZT20-23 49.52875 49.52875 49.52875