condition mean min max ZT0-3 10.513087500000001 9.172225000000001 11.853950000000001 ZT4-7 4.79139 4.79139 4.79139 ZT8-11 4.496755 4.496755 4.496755 ZT12-15 0 0 0 ZT16-19 7.290285 7.290285 7.290285 ZT20-23 7.93693 7.93693 7.93693