condition mean min max ZT0-3 44.1803 41.2978 47.062799999999996 ZT4-7 48.648 48.648 48.648 ZT8-11 66.4205 66.4205 66.4205 ZT12-15 0 0 0 ZT16-19 65.92060000000001 65.92060000000001 65.92060000000001 ZT20-23 51.9934 51.9934 51.9934