condition mean min max ZT0-3 16.44285 16.44285 16.44285 ZT4-7 13.0016 13.0016 13.0016 ZT8-11 13.059000000000001 13.059000000000001 13.059000000000001 ZT12-15 14.5516 14.5516 14.5516 ZT16-19 16.0399 16.0399 16.0399 ZT20-23 15.912049999999999 15.912049999999999 15.912049999999999