condition mean min max ZT0-3 0.5245513666666667 0.0 1.088125 ZT4-7 0.2567085 0.2567085 0.2567085 ZT8-11 0.00970075 0.00970075 0.00970075 ZT12-15 0.3215375 0.0 0.643075 ZT16-19 0.01881085 0.01881085 0.01881085 ZT20-23 0.0159079 0.0159079 0.0159079