condition mean min max ZT0-3 11.6900475 10.905645 12.474450000000001 ZT4-7 5.94651 5.94651 5.94651 ZT8-11 5.8766300000000005 5.8766300000000005 5.8766300000000005 ZT12-15 0 0 0 ZT16-19 8.150195 8.150195 8.150195 ZT20-23 9.140575 9.140575 9.140575