condition mean min max ZT0-3 0.3307589755 0.18632776199999998 0.47519018900000004 ZT4-7 0.89279213675 0.7348124844999999 1.0507717890000001 ZT8-11 1.086695217 1.0856717535 1.0877186805 ZT12-15 1.66367559925 1.1008397305000002 2.226511468 ZT16-19 1.999695981 1.9371465705 2.0622453915 ZT20-23 3.1387397335 2.973945663 3.303533804