condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.8997124999999999 0.8997124999999999 0.8997124999999999 ZT8-11 2.7962499999999997 2.7962499999999997 2.7962499999999997 ZT12-15 2.395375 2.395375 2.395375 ZT16-19 2.095066666666667 2.095066666666667 2.095066666666667 ZT20-23 0.87948 0.87948 0.87948