condition mean min max ZT0-3 64.67009999999999 64.67009999999999 64.67009999999999 ZT4-7 58.3602 58.3602 58.3602 ZT8-11 31.18515 31.18515 31.18515 ZT12-15 20.33925 20.33925 20.33925 ZT16-19 31.165300000000002 31.165300000000002 31.165300000000002 ZT20-23 58.1997 58.1997 58.1997