condition mean min max ZT0-3 3.7526133333333336 2.01681 5.05813 ZT4-7 6.028415 6.028415 6.028415 ZT8-11 0.661455 0.661455 0.661455 ZT12-15 0.8426609999999999 0.344755 1.3405669999999998 ZT16-19 5.30169 5.30169 5.30169 ZT20-23 1.009305 1.009305 1.009305