condition mean min max ZT0-3 4162.8 4162.8 4162.8 ZT4-7 3131.2 3131.2 3131.2 ZT8-11 3356.6 3356.6 3356.6 ZT12-15 3871.6499999999996 3871.6499999999996 3871.6499999999996 ZT16-19 4364.8 4364.8 4364.8 ZT20-23 4644.45 4644.45 4644.45