condition mean min max ZT0-3 5.7863425 3.3693400000000002 8.203344999999999 ZT4-7 5.169420000000001 5.169420000000001 5.169420000000001 ZT8-11 4.110685 4.110685 4.110685 ZT12-15 0 0 0 ZT16-19 7.176075 7.176075 7.176075 ZT20-23 6.00481 6.00481 6.00481