condition mean min max ZT0-3 0.037302966666666666 0.0154462 0.08063385 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.04260205 0.03451745 0.05068665 ZT16-19 0.04445845 0.04445845 0.04445845 ZT20-23 0.0346852 0.0346852 0.0346852