condition mean min max ZT0-3 60.849999999999994 60.849999999999994 60.849999999999994 ZT4-7 76.8 76.8 76.8 ZT8-11 80.25 80.25 80.25 ZT12-15 56.5 56.5 56.5 ZT16-19 62.95 62.95 62.95 ZT20-23 83.55000000000001 83.55000000000001 83.55000000000001