condition mean min max ZT0-3 5.672784999999999 5.672784999999999 5.672784999999999 ZT4-7 2.71555 2.71555 2.71555 ZT8-11 27.144199999999998 27.144199999999998 27.144199999999998 ZT12-15 37.99465 37.99465 37.99465 ZT16-19 34.2118 34.2118 34.2118 ZT20-23 9.90965 9.90965 9.90965