condition mean min max ZT0-3 199.14999999999998 199.14999999999998 199.14999999999998 ZT4-7 294.3 294.3 294.3 ZT8-11 464.09999999999997 464.09999999999997 464.09999999999997 ZT12-15 398.3 398.3 398.3 ZT16-19 537.8 537.8 537.8 ZT20-23 483.34999999999997 483.34999999999997 483.34999999999997