condition mean min max ZT0-3 46.882149 46.882149 46.882149 ZT4-7 146.91287250000002 146.91287250000002 146.91287250000002 ZT8-11 30.7959345 30.7959345 30.7959345 ZT12-15 16.8453295 16.8453295 16.8453295 ZT16-19 113.64547999999999 113.64547999999999 113.64547999999999 ZT20-23 225.10152399999998 225.10152399999998 225.10152399999998