condition mean min max ZT0-3 4.3016575 4.23486 4.368455 ZT4-7 4.133785 4.133785 4.133785 ZT8-11 4.51766 4.51766 4.51766 ZT12-15 0 0 0 ZT16-19 5.353695 5.353695 5.353695 ZT20-23 4.9572 4.9572 4.9572