condition mean min max ZT0-3 292.75 292.75 292.75 ZT4-7 283.5 283.5 283.5 ZT8-11 276.8 276.8 276.8 ZT12-15 335.35 335.35 335.35 ZT16-19 331.79999999999995 331.79999999999995 331.79999999999995 ZT20-23 433.0 433.0 433.0