condition mean min max ZT0-3 9.761814 9.761814 9.761814 ZT4-7 13.388854 13.388854 13.388854 ZT8-11 13.132028 13.132028 13.132028 ZT12-15 11.330066 11.330066 11.330066 ZT16-19 12.1723105 12.1723105 12.1723105 ZT20-23 12.680683 12.680683 12.680683