condition mean min max ZT0-3 0.04958525 0.04958525 0.04958525 ZT4-7 0.0 0.0 0.0 ZT8-11 0.014152999999999999 0.014152999999999999 0.014152999999999999 ZT12-15 0.020074416666666667 0.020074416666666667 0.020074416666666667 ZT16-19 0.07949575 0.07949575 0.07949575 ZT20-23 0.0 0.0 0.0