condition mean min max ZT0-3 0.34886 0.290979 0.43750049999999996 ZT4-7 0.4217465 0.4217465 0.4217465 ZT8-11 0.6983765 0.6983765 0.6983765 ZT12-15 0.4342955 0.4282855 0.4403055 ZT16-19 0.0 0.0 0.0 ZT20-23 0.319361 0.319361 0.319361