condition mean min max ZT0-3 11.805043 11.805043 11.805043 ZT4-7 11.232804999999999 11.232804999999999 11.232804999999999 ZT8-11 10.457588000000001 10.457588000000001 10.457588000000001 ZT12-15 10.3727845 10.3727845 10.3727845 ZT16-19 11.78491 11.78491 11.78491 ZT20-23 11.313808 11.313808 11.313808