condition mean min max ZT0-3 0.7463614999999999 0.7463614999999999 0.7463614999999999 ZT4-7 0.8717695 0.8717695 0.8717695 ZT8-11 0.642569 0.642569 0.642569 ZT12-15 0.972827 0.972827 0.972827 ZT16-19 0.54295 0.54295 0.54295 ZT20-23 0.6937385 0.6937385 0.6937385