condition mean min max ZT0-3 83.186063665 49.29356766 117.07855967 ZT4-7 198.96569720000002 195.15076095 202.78063345 ZT8-11 421.06387922500005 325.88703755 516.2407209 ZT12-15 438.722021525 289.6112107 587.83283235 ZT16-19 130.152716415 96.586621345 163.718811485 ZT20-23 26.7001225625 14.322813824999999 39.0774313