condition mean min max ZT0-3 0.2930275 0.2620595 0.3239955 ZT4-7 0.45823250000000004 0.45823250000000004 0.45823250000000004 ZT8-11 0.13139 0.13139 0.13139 ZT12-15 0 0 0 ZT16-19 0.19336799999999998 0.19336799999999998 0.19336799999999998 ZT20-23 0.25895250000000003 0.25895250000000003 0.25895250000000003