condition mean min max ZT0-3 477.79608 477.79608 477.79608 ZT4-7 588.384864 588.384864 588.384864 ZT8-11 392.202926 392.202926 392.202926 ZT12-15 213.951906 213.951906 213.951906 ZT16-19 135.8167875 135.8167875 135.8167875 ZT20-23 91.7660395 91.7660395 91.7660395