condition mean min max ZT0-3 12.4263 12.4263 12.4263 ZT4-7 7.464169999999999 7.464169999999999 7.464169999999999 ZT8-11 7.73737 7.73737 7.73737 ZT12-15 10.374825 10.374825 10.374825 ZT16-19 14.57925 14.57925 14.57925 ZT20-23 13.546050000000001 13.546050000000001 13.546050000000001