condition mean min max ZT0-3 50.73935 50.73935 50.73935 ZT4-7 65.2 65.2 65.2 ZT8-11 25.5198 25.5198 25.5198 ZT12-15 13.152650000000001 13.152650000000001 13.152650000000001 ZT16-19 20.232799999999997 20.232799999999997 20.232799999999997 ZT20-23 40.56295 40.56295 40.56295