condition mean min max ZT0-3 45.324627 45.324627 45.324627 ZT4-7 61.979841 61.979841 61.979841 ZT8-11 70.970658 70.970658 70.970658 ZT12-15 46.806327499999995 46.806327499999995 46.806327499999995 ZT16-19 35.9277945 35.9277945 35.9277945 ZT20-23 39.349547 39.349547 39.349547