condition mean min max ZT0-3 0.7424485 0.6598275 0.8250694999999999 ZT4-7 0.788109 0.788109 0.788109 ZT8-11 0.1796345 0.1796345 0.1796345 ZT12-15 0 0 0 ZT16-19 0.17732 0.17732 0.17732 ZT20-23 0.830524 0.830524 0.830524