condition mean min max ZT0-3 10.830058164 3.9620512210000003 17.698065107 ZT4-7 25.643349785 25.299048175000003 25.987651395 ZT8-11 15.84534873025 13.6600488055 18.030648655 ZT12-15 22.46771267 20.23177699 24.70364835 ZT16-19 28.550206505 26.36903561 30.7313774 ZT20-23 36.5637733425 32.28689568 40.840651005