condition mean min max ZT0-3 61.558815 61.558815 61.558815 ZT4-7 80.112807 80.112807 80.112807 ZT8-11 120.044419 120.044419 120.044419 ZT12-15 98.97399899999999 98.97399899999999 98.97399899999999 ZT16-19 68.0978385 68.0978385 68.0978385 ZT20-23 67.7146185 67.7146185 67.7146185