condition mean min max ZT0-3 11.22295 10.869150000000001 11.57675 ZT4-7 10.58485 10.58485 10.58485 ZT8-11 11.5372 11.5372 11.5372 ZT12-15 0 0 0 ZT16-19 12.49285 12.49285 12.49285 ZT20-23 13.16855 13.16855 13.16855