condition mean min max ZT0-3 15.5213 15.5213 15.5213 ZT4-7 49.28965 49.28965 49.28965 ZT8-11 18.168599999999998 18.168599999999998 18.168599999999998 ZT12-15 8.824055 8.824055 8.824055 ZT16-19 6.8756450000000005 6.8756450000000005 6.8756450000000005 ZT20-23 10.01125 10.01125 10.01125