condition mean min max ZT0-3 3.71796 3.544875 3.891045 ZT4-7 6.073715 6.073715 6.073715 ZT8-11 7.387645 7.387645 7.387645 ZT12-15 0 0 0 ZT16-19 5.87614 5.87614 5.87614 ZT20-23 4.20395 4.20395 4.20395