condition mean min max ZT0-3 71.8297 63.6066 80.05279999999999 ZT4-7 19.7701 19.7701 19.7701 ZT8-11 8.010965 8.010965 8.010965 ZT12-15 0 0 0 ZT16-19 13.61505 13.61505 13.61505 ZT20-23 29.04925 29.04925 29.04925