condition mean min max ZT0-3 1.2386 1.2386 1.2386 ZT4-7 0.708507 0.708507 0.708507 ZT8-11 0.85205 0.85205 0.85205 ZT12-15 1.820505 1.820505 1.820505 ZT16-19 1.87263 1.87263 1.87263 ZT20-23 1.379755 1.379755 1.379755