condition mean min max ZT0-3 0.3247125 0.3247125 0.3247125 ZT4-7 0.37148749999999997 0.37148749999999997 0.37148749999999997 ZT8-11 0.1952295 0.1952295 0.1952295 ZT12-15 0.252741 0.252741 0.252741 ZT16-19 0.48479750000000005 0.48479750000000005 0.48479750000000005 ZT20-23 0.38199799999999995 0.38199799999999995 0.38199799999999995