condition mean min max ZT0-3 0.744445 0.0 1.48889 ZT4-7 0.751335 0.751335 0.751335 ZT8-11 3.01571 3.01571 3.01571 ZT12-15 0 0 0 ZT16-19 1.502765 1.502765 1.502765 ZT20-23 1.507365 1.507365 1.507365