condition mean min max ZT0-3 63.05 63.05 63.05 ZT4-7 10.5 10.5 10.5 ZT8-11 69.85 69.85 69.85 ZT12-15 56.75 56.75 56.75 ZT16-19 54.35 54.35 54.35 ZT20-23 54.900000000000006 54.900000000000006 54.900000000000006