condition mean min max ZT0-3 82.3 82.3 82.3 ZT4-7 260.3 260.3 260.3 ZT8-11 208.14999999999998 208.14999999999998 208.14999999999998 ZT12-15 63.349999999999994 63.349999999999994 63.349999999999994 ZT16-19 24.3 24.3 24.3 ZT20-23 37.849999999999994 37.849999999999994 37.849999999999994