condition mean min max ZT0-3 0.6756638333333334 0.46253849999999996 0.800568 ZT4-7 0.30340049999999996 0.30340049999999996 0.30340049999999996 ZT8-11 0.311999 0.311999 0.311999 ZT12-15 0.4433725 0.4381075 0.4486375 ZT16-19 0.48377749999999997 0.48377749999999997 0.48377749999999997 ZT20-23 0.6049165 0.6049165 0.6049165