condition mean min max ZT0-3 169.2422 169.2422 169.2422 ZT4-7 222.33249999999998 222.33249999999998 222.33249999999998 ZT8-11 207.3524 207.3524 207.3524 ZT12-15 133.6994 133.6994 133.6994 ZT16-19 198.1078 198.1078 198.1078 ZT20-23 130.85241666666667 130.85241666666667 130.85241666666667