condition mean min max ZT0-3 2.415002 0.9745739999999999 3.85543 ZT4-7 1.2911139999999999 1.2911139999999999 1.2911139999999999 ZT8-11 0.64241 0.64241 0.64241 ZT12-15 0 0 0 ZT16-19 1.2779699999999998 1.2779699999999998 1.2779699999999998 ZT20-23 1.612245 1.612245 1.612245