condition mean min max ZT0-3 0.906065 0.905455 0.906675 ZT4-7 0.89393 0.89393 0.89393 ZT8-11 0.92294 0.92294 0.92294 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.900485 0.900485 0.900485