condition mean min max ZT0-3 122.97565000000002 81.65045 152.75400000000002 ZT4-7 69.27185 69.27185 69.27185 ZT8-11 57.149950000000004 57.149950000000004 57.149950000000004 ZT12-15 74.57492500000001 70.4893 78.66055 ZT16-19 97.8058 97.8058 97.8058 ZT20-23 165.2095 165.2095 165.2095