condition mean min max ZT0-3 0.014135 0.014135 0.014135 ZT4-7 0.021055499999999998 0.021055499999999998 0.021055499999999998 ZT8-11 0.01687805 0.01687805 0.01687805 ZT12-15 0.0 0.0 0.0 ZT16-19 0.011581566666666668 0.011581566666666668 0.011581566666666668 ZT20-23 0.0308731 0.0308731 0.0308731