condition mean min max ZT0-3 48.692449999999994 48.692449999999994 48.692449999999994 ZT4-7 36.2527 36.2527 36.2527 ZT8-11 31.0617 31.0617 31.0617 ZT12-15 45.4618 45.4618 45.4618 ZT16-19 63.823750000000004 63.823750000000004 63.823750000000004 ZT20-23 47.698499999999996 47.698499999999996 47.698499999999996