condition mean min max ZT0-3 1860.77380275 1817.91278 1903.6348255 ZT4-7 1328.3475235 1081.2925255 1575.4025215000001 ZT8-11 1158.23554175 1106.176731 1210.2943525 ZT12-15 2425.58918725 2108.5028205 2742.6755540000004 ZT16-19 2658.805079 2645.2413850000003 2672.368773 ZT20-23 2337.0340825 2193.09857 2480.9695949999996