condition mean min max ZT0-3 15.233049999999999 15.233049999999999 15.233049999999999 ZT4-7 10.198425 10.198425 10.198425 ZT8-11 14.28455 14.28455 14.28455 ZT12-15 28.009900000000002 28.009900000000002 28.009900000000002 ZT16-19 30.241799999999998 30.241799999999998 30.241799999999998 ZT20-23 22.090249999999997 22.090249999999997 22.090249999999997