condition mean min max ZT0-3 4226.35 4226.35 4226.35 ZT4-7 4386.5 4386.5 4386.5 ZT8-11 4342.85 4342.85 4342.85 ZT12-15 4116.5 4116.5 4116.5 ZT16-19 4747.450000000001 4747.450000000001 4747.450000000001 ZT20-23 4525.65 4525.65 4525.65