condition mean min max ZT0-3 0.32030881450000004 0.255820413 0.384797216 ZT4-7 0.757440707 0.6436881354999999 0.8711932785 ZT8-11 0.9443626435 0.895950177 0.99277511 ZT12-15 0.5596103729999999 0.4752985865 0.6439221595 ZT16-19 0.7012573185 0.5983803605 0.8041342765 ZT20-23 1.51965679025 1.3579106145 1.681402966