condition mean min max ZT0-3 274.002008 274.002008 274.002008 ZT4-7 209.7705185 209.7705185 209.7705185 ZT8-11 151.2007665 151.2007665 151.2007665 ZT12-15 206.30981350000002 206.30981350000002 206.30981350000002 ZT16-19 161.487424 161.487424 161.487424 ZT20-23 94.7002715 94.7002715 94.7002715