condition mean min max ZT0-3 2.36607284175 1.209507391 3.5226382925 ZT4-7 4.923753678 4.8364337724999995 5.0110735835 ZT8-11 2.0779410015 1.478616469 2.677265534 ZT12-15 0.92721502975 0.6192907605 1.235139299 ZT16-19 3.29058559975 2.090350594 4.4908206055 ZT20-23 13.366697144 9.026489428 17.70690486