condition mean min max ZT0-3 3.0154 2.8598850000000002 3.170915 ZT4-7 3.333115 3.333115 3.333115 ZT8-11 5.822945000000001 5.822945000000001 5.822945000000001 ZT12-15 0 0 0 ZT16-19 7.86403 7.86403 7.86403 ZT20-23 5.425995 5.425995 5.425995