condition mean min max ZT0-3 10.692 10.692 10.692 ZT4-7 9.00636 9.00636 9.00636 ZT8-11 7.66985 7.66985 7.66985 ZT12-15 8.489005 8.489005 8.489005 ZT16-19 11.62555 11.62555 11.62555 ZT20-23 10.91905 10.91905 10.91905