condition mean min max ZT0-3 66.72970000000001 66.72970000000001 66.72970000000001 ZT4-7 60.66755 60.66755 60.66755 ZT8-11 57.1392 57.1392 57.1392 ZT12-15 55.7038 55.7038 55.7038 ZT16-19 70.4709 70.4709 70.4709 ZT20-23 87.24665 87.24665 87.24665