condition mean min max ZT0-3 39.4058 39.4058 39.4058 ZT4-7 19.14785 19.14785 19.14785 ZT8-11 18.0287 18.0287 18.0287 ZT12-15 30.7269 30.7269 30.7269 ZT16-19 50.5147 50.5147 50.5147 ZT20-23 49.0689 49.0689 49.0689