condition mean min max ZT0-3 0.020040250000000003 0.01978825 0.02029225 ZT4-7 0.03062515 0.03062515 0.03062515 ZT8-11 0.0200403 0.0200403 0.0200403 ZT12-15 0 0 0 ZT16-19 0.01989405 0.01989405 0.01989405 ZT20-23 0.0 0.0 0.0