condition mean min max ZT0-3 201.75 201.75 201.75 ZT4-7 39.3 39.3 39.3 ZT8-11 68.85 68.85 68.85 ZT12-15 202.55 202.55 202.55 ZT16-19 278.7 278.7 278.7 ZT20-23 253.15 253.15 253.15