condition mean min max ZT0-3 32.95 32.95 32.95 ZT4-7 10.1 10.1 10.1 ZT8-11 63.099999999999994 63.099999999999994 63.099999999999994 ZT12-15 36.5 36.5 36.5 ZT16-19 69.45 69.45 69.45 ZT20-23 59.25 59.25 59.25