condition mean min max ZT0-3 0.7288003333333333 0.147142 1.0817195 ZT4-7 0.518573 0.518573 0.518573 ZT8-11 1.079205 1.079205 1.079205 ZT12-15 0.836955 0.6940975 0.9798125 ZT16-19 0.7796155 0.7796155 0.7796155 ZT20-23 1.316201 1.316201 1.316201