condition mean min max ZT0-3 51.1493 50.60405 51.69455 ZT4-7 74.72805 74.72805 74.72805 ZT8-11 80.9571 80.9571 80.9571 ZT12-15 0 0 0 ZT16-19 64.986 64.986 64.986 ZT20-23 70.7422 70.7422 70.7422