condition mean min max ZT0-3 83.94006666666667 68.4301 94.40979999999999 ZT4-7 65.3341 65.3341 65.3341 ZT8-11 57.0313 57.0313 57.0313 ZT12-15 80.88482499999999 78.05754999999999 83.71209999999999 ZT16-19 85.21010000000001 85.21010000000001 85.21010000000001 ZT20-23 107.6985 107.6985 107.6985