condition mean min max ZT0-3 41.417699999999996 41.417699999999996 41.417699999999996 ZT4-7 38.652249999999995 38.652249999999995 38.652249999999995 ZT8-11 30.85985 30.85985 30.85985 ZT12-15 34.582499999999996 34.582499999999996 34.582499999999996 ZT16-19 42.0028 42.0028 42.0028 ZT20-23 43.12835 43.12835 43.12835