condition mean min max ZT0-3 15.023800000000001 15.023800000000001 15.023800000000001 ZT4-7 10.88392 10.88392 10.88392 ZT8-11 5.712955 5.712955 5.712955 ZT12-15 7.28725 7.28725 7.28725 ZT16-19 26.0753 26.0753 26.0753 ZT20-23 16.4362 16.4362 16.4362