condition mean min max ZT0-3 57.882949999999994 55.26105 60.50485 ZT4-7 20.4863 20.4863 20.4863 ZT8-11 18.17145 18.17145 18.17145 ZT12-15 0 0 0 ZT16-19 27.153799999999997 27.153799999999997 27.153799999999997 ZT20-23 35.542950000000005 35.542950000000005 35.542950000000005