condition mean min max ZT0-3 0.48571725 0.384255 0.5871795 ZT4-7 0.6829755 0.6829755 0.6829755 ZT8-11 1.1763599999999999 1.1763599999999999 1.1763599999999999 ZT12-15 0 0 0 ZT16-19 1.6348099999999999 1.6348099999999999 1.6348099999999999 ZT20-23 0.9667695000000001 0.9667695000000001 0.9667695000000001