condition mean min max ZT0-3 9.325452499999999 4.952305 13.698599999999999 ZT4-7 10.48389 10.48389 10.48389 ZT8-11 3.680575 3.680575 3.680575 ZT12-15 0 0 0 ZT16-19 7.85461 7.85461 7.85461 ZT20-23 12.3491 12.3491 12.3491