condition mean min max ZT0-3 757.3499999999999 757.3499999999999 757.3499999999999 ZT4-7 1519.3 1519.3 1519.3 ZT8-11 1605.6 1605.6 1605.6 ZT12-15 1443.35 1443.35 1443.35 ZT16-19 975.45 975.45 975.45 ZT20-23 753.5999999999999 753.5999999999999 753.5999999999999