condition mean min max ZT0-3 4821.65 4821.65 4821.65 ZT4-7 5838.8 5838.8 5838.8 ZT8-11 4823.9 4823.9 4823.9 ZT12-15 4213.6 4213.6 4213.6 ZT16-19 3938.6 3938.6 3938.6 ZT20-23 3901.15 3901.15 3901.15