condition mean min max ZT0-3 1679.3000000000002 1679.3000000000002 1679.3000000000002 ZT4-7 1653.3 1653.3 1653.3 ZT8-11 1568.65 1568.65 1568.65 ZT12-15 1320.85 1320.85 1320.85 ZT16-19 1234.9 1234.9 1234.9 ZT20-23 1446.65 1446.65 1446.65