condition mean min max ZT0-3 75.310768 75.310768 75.310768 ZT4-7 128.77094599999998 128.77094599999998 128.77094599999998 ZT8-11 168.1370245 168.1370245 168.1370245 ZT12-15 132.6563325 132.6563325 132.6563325 ZT16-19 109.0077655 109.0077655 109.0077655 ZT20-23 76.2495285 76.2495285 76.2495285