condition mean min max ZT0-3 9.65 9.65 9.65 ZT4-7 2.1 2.1 2.1 ZT8-11 29.65 29.65 29.65 ZT12-15 3.65 3.65 3.65 ZT16-19 29.049999999999997 29.049999999999997 29.049999999999997 ZT20-23 59.150000000000006 59.150000000000006 59.150000000000006