condition mean min max ZT0-3 0.1458545 0.0 0.2217615 ZT4-7 0.27754650000000003 0.27754650000000003 0.27754650000000003 ZT8-11 0.6505935 0.6505935 0.6505935 ZT12-15 0.8412155 0.5903205 1.0921105 ZT16-19 0.7568999999999999 0.7568999999999999 0.7568999999999999 ZT20-23 0.5494645 0.5494645 0.5494645