condition mean min max ZT0-3 79.2 79.2 79.2 ZT4-7 51.1 51.1 51.1 ZT8-11 59.25 59.25 59.25 ZT12-15 62.699999999999996 62.699999999999996 62.699999999999996 ZT16-19 49.0 49.0 49.0 ZT20-23 82.4 82.4 82.4