condition mean min max ZT0-3 0.5965175 0.1913635 1.3001305 ZT4-7 0.5685905 0.5685905 0.5685905 ZT8-11 0.590335 0.590335 0.590335 ZT12-15 0.5619805 0.4099075 0.7140535 ZT16-19 0.7482850000000001 0.7482850000000001 0.7482850000000001 ZT20-23 0.740517 0.740517 0.740517