condition mean min max ZT0-3 990.45 990.45 990.45 ZT4-7 2709.6 2709.6 2709.6 ZT8-11 4282.4 4282.4 4282.4 ZT12-15 8156.85 8156.85 8156.85 ZT16-19 5856.299999999999 5856.299999999999 5856.299999999999 ZT20-23 1937.0 1937.0 1937.0