condition mean min max ZT0-3 385.344944 385.344944 385.344944 ZT4-7 78.6855145 78.6855145 78.6855145 ZT8-11 82.563726 82.563726 82.563726 ZT12-15 108.5427245 108.5427245 108.5427245 ZT16-19 325.6013565 325.6013565 325.6013565 ZT20-23 352.38475 352.38475 352.38475