condition mean min max ZT0-3 566.81275 540.1785 593.447 ZT4-7 607.6605 607.6605 607.6605 ZT8-11 593.5455 593.5455 593.5455 ZT12-15 0 0 0 ZT16-19 941.5795 941.5795 941.5795 ZT20-23 664.946 664.946 664.946