condition mean min max ZT0-3 12.578075 12.569749999999999 12.586400000000001 ZT4-7 6.6831700000000005 6.6831700000000005 6.6831700000000005 ZT8-11 5.801525 5.801525 5.801525 ZT12-15 0 0 0 ZT16-19 8.83963 8.83963 8.83963 ZT20-23 8.312850000000001 8.312850000000001 8.312850000000001