condition mean min max ZT0-3 15.074950000000001 14.60565 15.54425 ZT4-7 15.061050000000002 15.061050000000002 15.061050000000002 ZT8-11 27.481450000000002 27.481450000000002 27.481450000000002 ZT12-15 0 0 0 ZT16-19 39.37805 39.37805 39.37805 ZT20-23 24.063000000000002 24.063000000000002 24.063000000000002