condition mean min max ZT0-3 5.10689 4.158925 6.054855 ZT4-7 3.8914099999999996 3.8914099999999996 3.8914099999999996 ZT8-11 5.486225 5.486225 5.486225 ZT12-15 0 0 0 ZT16-19 6.90871 6.90871 6.90871 ZT20-23 6.657695 6.657695 6.657695