condition mean min max ZT0-3 78.89565 77.37455 80.41675000000001 ZT4-7 74.6637 74.6637 74.6637 ZT8-11 117.6335 117.6335 117.6335 ZT12-15 0 0 0 ZT16-19 147.178 147.178 147.178 ZT20-23 100.9159 100.9159 100.9159