condition mean min max ZT0-3 0.80986025 0.675136 0.9445844999999999 ZT4-7 0.7262275 0.7262275 0.7262275 ZT8-11 0.615295 0.615295 0.615295 ZT12-15 0 0 0 ZT16-19 0.9439649999999999 0.9439649999999999 0.9439649999999999 ZT20-23 0.712651 0.712651 0.712651