condition mean min max ZT0-3 85.25 85.25 85.25 ZT4-7 54.1 54.1 54.1 ZT8-11 25.549999999999997 25.549999999999997 25.549999999999997 ZT12-15 54.150000000000006 54.150000000000006 54.150000000000006 ZT16-19 17.45 17.45 17.45 ZT20-23 20.35 20.35 20.35