condition mean min max ZT0-3 63.9 63.9 63.9 ZT4-7 61.5 61.5 61.5 ZT8-11 29.4 29.4 29.4 ZT12-15 57.1 57.1 57.1 ZT16-19 51.8 51.8 51.8 ZT20-23 54.150000000000006 54.150000000000006 54.150000000000006