condition mean min max ZT0-3 43.7451 43.7451 43.7451 ZT4-7 31.501199999999997 31.501199999999997 31.501199999999997 ZT8-11 38.47655 38.47655 38.47655 ZT12-15 36.834649999999996 36.834649999999996 36.834649999999996 ZT16-19 53.54835 53.54835 53.54835 ZT20-23 45.598650000000006 45.598650000000006 45.598650000000006