condition mean min max ZT0-3 6.550204999999999 4.871124999999999 8.229284999999999 ZT4-7 14.225549999999998 14.225549999999998 14.225549999999998 ZT8-11 7.880115 7.880115 7.880115 ZT12-15 0 0 0 ZT16-19 11.838000000000001 11.838000000000001 11.838000000000001 ZT20-23 12.855799999999999 12.855799999999999 12.855799999999999