condition mean min max ZT0-3 48.6281972825 45.08009293 52.176301635 ZT4-7 53.94157608333333 47.82501087 60.05814129666667 ZT8-11 72.424233865 69.50302068 75.34544705 ZT12-15 92.93700727833334 85.60302493666667 100.27098962 ZT16-19 77.22296139666668 75.36433983 79.08158296333333 ZT20-23 63.98986519500001 60.93024818 67.04948221000001