condition mean min max ZT0-3 0.7552848333333333 0.2049215 1.65506 ZT4-7 0.3490678 0.3490678 0.3490678 ZT8-11 0.7066285000000001 0.7066285000000001 0.7066285000000001 ZT12-15 2.806255 2.241445 3.3710649999999998 ZT16-19 2.562255 2.562255 2.562255 ZT20-23 1.716134 1.716134 1.716134