condition mean min max ZT0-3 126.49866666666667 111.795 137.113 ZT4-7 177.214 177.214 177.214 ZT8-11 191.698 191.698 191.698 ZT12-15 302.83725000000004 292.749 312.9255 ZT16-19 401.444 401.444 401.444 ZT20-23 233.7745 233.7745 233.7745