condition mean min max ZT0-3 10.19422 8.94174 11.4467 ZT4-7 3.85558 3.85558 3.85558 ZT8-11 4.565815 4.565815 4.565815 ZT12-15 0 0 0 ZT16-19 16.00965 16.00965 16.00965 ZT20-23 16.35565 16.35565 16.35565