condition mean min max ZT0-3 78.52195 78.52195 78.52195 ZT4-7 57.60275 57.60275 57.60275 ZT8-11 56.112849999999995 56.112849999999995 56.112849999999995 ZT12-15 45.2423 45.2423 45.2423 ZT16-19 58.861549999999994 58.861549999999994 58.861549999999994 ZT20-23 67.86985 67.86985 67.86985