condition mean min max ZT0-3 0.8048188333333334 0.0 1.366498 ZT4-7 0.340599 0.340599 0.340599 ZT8-11 1.3807935 1.3807935 1.3807935 ZT12-15 1.0794655 0.720316 1.438615 ZT16-19 0.334367 0.334367 0.334367 ZT20-23 1.50814 1.50814 1.50814