condition mean min max ZT0-3 11.465239 11.465239 11.465239 ZT4-7 11.172444500000001 11.172444500000001 11.172444500000001 ZT8-11 10.976728000000001 10.976728000000001 10.976728000000001 ZT12-15 11.577155999999999 11.577155999999999 11.577155999999999 ZT16-19 12.193403 12.193403 12.193403 ZT20-23 11.9748525 11.9748525 11.9748525