condition mean min max ZT0-3 0.67002325 0.5199024999999999 0.820144 ZT4-7 0.8967905 0.8967905 0.8967905 ZT8-11 1.937075 1.937075 1.937075 ZT12-15 0 0 0 ZT16-19 2.11349 2.11349 2.11349 ZT20-23 1.0268415000000002 1.0268415000000002 1.0268415000000002