condition mean min max ZT0-3 7.14192 7.14192 7.14192 ZT4-7 6.753360000000001 6.753360000000001 6.753360000000001 ZT8-11 5.175045 5.175045 5.175045 ZT12-15 4.64947 4.64947 4.64947 ZT16-19 5.04793 5.04793 5.04793 ZT20-23 6.079655 6.079655 6.079655