condition mean min max ZT0-3 0.30649165925 0.13047307 0.4825102485 ZT4-7 1.3858833695 0.853466792 1.918299947 ZT8-11 3.21163610575 2.096216751 4.3270554605 ZT12-15 3.68642154025 3.5818717905 3.79097129 ZT16-19 3.54036067725 3.315105335 3.7656160195 ZT20-23 4.39163576225 3.8965488865 4.886722638