condition mean min max ZT0-3 74.242075 58.9424 89.54175000000001 ZT4-7 67.85810000000001 67.85810000000001 67.85810000000001 ZT8-11 16.24875 16.24875 16.24875 ZT12-15 0 0 0 ZT16-19 0.404375 0.404375 0.404375 ZT20-23 1.704555 1.704555 1.704555