condition mean min max ZT0-3 11.969349999999999 11.969349999999999 11.969349999999999 ZT4-7 8.191915 8.191915 8.191915 ZT8-11 9.2819 9.2819 9.2819 ZT12-15 10.658345 10.658345 10.658345 ZT16-19 14.4519 14.4519 14.4519 ZT20-23 13.18855 13.18855 13.18855