condition mean min max ZT0-3 0.6263924999999999 0.6263924999999999 0.6263924999999999 ZT4-7 0.395197 0.395197 0.395197 ZT8-11 0.6842165 0.6842165 0.6842165 ZT12-15 0.6650725 0.6650725 0.6650725 ZT16-19 0.523938 0.523938 0.523938 ZT20-23 0.837387 0.837387 0.837387