condition mean min max ZT0-3 0.0408138 0.0408138 0.0408138 ZT4-7 0.0344854 0.0344854 0.0344854 ZT8-11 0.02579485 0.02579485 0.02579485 ZT12-15 0.0370521 0.0370521 0.0370521 ZT16-19 0.0826644 0.0826644 0.0826644 ZT20-23 0.037247249999999996 0.037247249999999996 0.037247249999999996