condition mean min max ZT0-3 59.849999999999994 59.849999999999994 59.849999999999994 ZT4-7 56.9 56.9 56.9 ZT8-11 39.75 39.75 39.75 ZT12-15 70.75 70.75 70.75 ZT16-19 66.15 66.15 66.15 ZT20-23 58.7 58.7 58.7