condition mean min max ZT0-3 49.010675 48.805099999999996 49.21625 ZT4-7 58.83565 58.83565 58.83565 ZT8-11 106.215 106.215 106.215 ZT12-15 0 0 0 ZT16-19 97.49015 97.49015 97.49015 ZT20-23 75.46969999999999 75.46969999999999 75.46969999999999