condition mean min max ZT0-3 0.03470115 0.0 0.082816 ZT4-7 0.07824205000000001 0.07824205000000001 0.07824205000000001 ZT8-11 0.0 0.0 0.0 ZT12-15 0.052640925000000005 0.0424323 0.06284955 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0214487 0.0214487 0.0214487