condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.4729715 0.4729715 0.4729715 ZT8-11 0.2566095 0.2566095 0.2566095 ZT12-15 0.0 0.0 0.0 ZT16-19 0.4149765 0.4149765 0.4149765 ZT20-23 0.305684 0.305684 0.305684