condition mean min max ZT0-3 41.07356666666667 30.22855 52.0416 ZT4-7 31.8159 31.8159 31.8159 ZT8-11 54.3895 54.3895 54.3895 ZT12-15 56.703675000000004 53.80415 59.6032 ZT16-19 52.58775 52.58775 52.58775 ZT20-23 53.15205 53.15205 53.15205