condition mean min max ZT0-3 0.9753114999999999 0.726177 1.224446 ZT4-7 1.356557 1.356557 1.356557 ZT8-11 2.8434850000000003 2.8434850000000003 2.8434850000000003 ZT12-15 0 0 0 ZT16-19 1.258715 1.258715 1.258715 ZT20-23 1.058805 1.058805 1.058805