condition mean min max ZT0-3 38.74418333333333 30.877699999999997 45.5154 ZT4-7 25.78715 25.78715 25.78715 ZT8-11 33.0851 33.0851 33.0851 ZT12-15 45.21355 43.2783 47.148799999999994 ZT16-19 49.5112 49.5112 49.5112 ZT20-23 58.064099999999996 58.064099999999996 58.064099999999996