condition mean min max ZT0-3 57.45 57.45 57.45 ZT4-7 34.2 34.2 34.2 ZT8-11 49.95 49.95 49.95 ZT12-15 39.8 39.8 39.8 ZT16-19 51.45 51.45 51.45 ZT20-23 61.2 61.2 61.2