condition mean min max ZT0-3 25.849999999999998 25.849999999999998 25.849999999999998 ZT4-7 16.5 16.5 16.5 ZT8-11 38.45 38.45 38.45 ZT12-15 10.65 10.65 10.65 ZT16-19 19.6 19.6 19.6 ZT20-23 44.150000000000006 44.150000000000006 44.150000000000006