condition mean min max ZT0-3 28.454875 28.10205 28.8077 ZT4-7 42.766149999999996 42.766149999999996 42.766149999999996 ZT8-11 22.62945 22.62945 22.62945 ZT12-15 0 0 0 ZT16-19 22.6548 22.6548 22.6548 ZT20-23 27.6297 27.6297 27.6297