condition mean min max ZT0-3 0.06351327500000001 0.05859905 0.0684275 ZT4-7 0.0597988 0.0597988 0.0597988 ZT8-11 0.4458025 0.4458025 0.4458025 ZT12-15 0 0 0 ZT16-19 0.3038715 0.3038715 0.3038715 ZT20-23 0.185578 0.185578 0.185578