condition mean min max ZT0-3 74.6 74.6 74.6 ZT4-7 54.509699999999995 54.509699999999995 54.509699999999995 ZT8-11 60.7752 60.7752 60.7752 ZT12-15 64.71325 64.71325 64.71325 ZT16-19 89.16045 89.16045 89.16045 ZT20-23 75.90764999999999 75.90764999999999 75.90764999999999