condition mean min max ZT0-3 0.83346425 0.724438 0.9424905 ZT4-7 0.803171 0.803171 0.803171 ZT8-11 0.5476045 0.5476045 0.5476045 ZT12-15 0 0 0 ZT16-19 0.4282115 0.4282115 0.4282115 ZT20-23 0.715504 0.715504 0.715504