condition mean min max ZT0-3 41.55 41.55 41.55 ZT4-7 3.3 3.3 3.3 ZT8-11 16.6 16.6 16.6 ZT12-15 59.150000000000006 59.150000000000006 59.150000000000006 ZT16-19 54.85 54.85 54.85 ZT20-23 75.85 75.85 75.85