condition mean min max ZT0-3 22.0798 20.4893 23.670299999999997 ZT4-7 23.4458 23.4458 23.4458 ZT8-11 14.9418 14.9418 14.9418 ZT12-15 0 0 0 ZT16-19 19.10035 19.10035 19.10035 ZT20-23 24.3099 24.3099 24.3099