condition mean min max ZT0-3 44.4992 39.573 49.425399999999996 ZT4-7 16.189799999999998 16.189799999999998 16.189799999999998 ZT8-11 14.2258 14.2258 14.2258 ZT12-15 0 0 0 ZT16-19 17.11525 17.11525 17.11525 ZT20-23 22.93255 22.93255 22.93255