condition mean min max ZT0-3 9.16647 9.16647 9.16647 ZT4-7 20.9143475 20.9143475 20.9143475 ZT8-11 25.91161 25.91161 25.91161 ZT12-15 18.1833615 18.1833615 18.1833615 ZT16-19 11.530411 11.530411 11.530411 ZT20-23 10.226313000000001 10.226313000000001 10.226313000000001