condition mean min max ZT0-3 292.1 292.1 292.1 ZT4-7 189.5 189.5 189.5 ZT8-11 253.1 253.1 253.1 ZT12-15 273.85 273.85 273.85 ZT16-19 250.7 250.7 250.7 ZT20-23 246.25 246.25 246.25