condition mean min max ZT0-3 0.20501 0.052391 0.357629 ZT4-7 0.8508775 0.8508775 0.8508775 ZT8-11 1.568665 1.568665 1.568665 ZT12-15 0 0 0 ZT16-19 0.61879 0.61879 0.61879 ZT20-23 0.7756405 0.7756405 0.7756405