condition mean min max ZT0-3 12.011700000000001 10.71365 13.309750000000001 ZT4-7 22.30745 22.30745 22.30745 ZT8-11 19.63675 19.63675 19.63675 ZT12-15 0 0 0 ZT16-19 17.8247 17.8247 17.8247 ZT20-23 15.52885 15.52885 15.52885