condition mean min max ZT0-3 7.59449 7.59449 7.59449 ZT4-7 4.626860000000001 4.626860000000001 4.626860000000001 ZT8-11 7.427365 7.427365 7.427365 ZT12-15 12.3001 12.3001 12.3001 ZT16-19 14.4763 14.4763 14.4763 ZT20-23 9.94329 9.94329 9.94329