condition mean min max ZT0-3 0.2999266666666667 0.0 0.89978 ZT4-7 0.4856455 0.4856455 0.4856455 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.643985 0.643985 0.643985