condition mean min max ZT0-3 228.9 228.9 228.9 ZT4-7 193.8 193.8 193.8 ZT8-11 194.55 194.55 194.55 ZT12-15 189.15 189.15 189.15 ZT16-19 277.6 277.6 277.6 ZT20-23 305.0 305.0 305.0