condition mean min max ZT0-3 52.355225 51.79455 52.91589999999999 ZT4-7 45.993700000000004 45.993700000000004 45.993700000000004 ZT8-11 38.238699999999994 38.238699999999994 38.238699999999994 ZT12-15 0 0 0 ZT16-19 52.96965 52.96965 52.96965 ZT20-23 52.87805 52.87805 52.87805