condition mean min max ZT0-3 50.9983741225 39.890058505000006 62.10668974 ZT4-7 9.27851564125 8.282658465999999 10.2743728165 ZT8-11 11.970512268499998 8.551422346499999 15.3896021905 ZT12-15 12.6122567675 11.6530744115 13.5714391235 ZT16-19 16.2249292125 15.442327685 17.00753074 ZT20-23 17.5523441375 16.839441139999998 18.265247135