condition mean min max ZT0-3 12.10115 12.10115 12.10115 ZT4-7 10.017785 10.017785 10.017785 ZT8-11 10.447565 10.447565 10.447565 ZT12-15 12.77125 12.77125 12.77125 ZT16-19 16.44115 16.44115 16.44115 ZT20-23 14.53275 14.53275 14.53275