condition mean min max ZT0-3 35.4070616125 25.638912765 45.17521046 ZT4-7 29.73880176 22.57428536 36.90331816 ZT8-11 59.876100570000006 43.01341516 76.73878598 ZT12-15 64.07281068750001 55.660141675000006 72.4854797 ZT16-19 69.3007848875 62.312398055 76.28917172 ZT20-23 95.87426489 89.49229462 102.25623516