condition mean min max ZT0-3 0.71197175 0.651196 0.7727475 ZT4-7 1.1127605 1.1127605 1.1127605 ZT8-11 0.8886054999999999 0.8886054999999999 0.8886054999999999 ZT12-15 0 0 0 ZT16-19 1.627635 1.627635 1.627635 ZT20-23 2.18048 2.18048 2.18048