condition mean min max ZT0-3 7.85942 6.361415 9.357425 ZT4-7 2.567415 2.567415 2.567415 ZT8-11 3.87493 3.87493 3.87493 ZT12-15 0 0 0 ZT16-19 8.401455 8.401455 8.401455 ZT20-23 5.76155 5.76155 5.76155