condition mean min max ZT0-3 0.8664575 0.8664575 0.8664575 ZT4-7 1.07071 1.07071 1.07071 ZT8-11 0.8430645 0.8430645 0.8430645 ZT12-15 0.9761215 0.9761215 0.9761215 ZT16-19 1.137385 1.137385 1.137385 ZT20-23 0.7608429999999999 0.7608429999999999 0.7608429999999999