condition mean min max ZT0-3 2653.5 2653.5 2653.5 ZT4-7 1886.5 1886.5 1886.5 ZT8-11 2450.25 2450.25 2450.25 ZT12-15 2514.1 2514.1 2514.1 ZT16-19 2324.65 2324.65 2324.65 ZT20-23 2823.25 2823.25 2823.25