condition mean min max ZT0-3 0.07856965 0.07856965 0.07856965 ZT4-7 0.03802925 0.03802925 0.03802925 ZT8-11 0.03603835 0.03603835 0.03603835 ZT12-15 0.0 0.0 0.0 ZT16-19 0.049811499999999995 0.049811499999999995 0.049811499999999995 ZT20-23 0.0490119 0.0490119 0.0490119