condition mean min max ZT0-3 365.45 365.45 365.45 ZT4-7 494.4 494.4 494.4 ZT8-11 485.45 485.45 485.45 ZT12-15 441.95000000000005 441.95000000000005 441.95000000000005 ZT16-19 439.34999999999997 439.34999999999997 439.34999999999997 ZT20-23 237.25 237.25 237.25