condition mean min max ZT0-3 0.24316749999999998 0.24316749999999998 0.24316749999999998 ZT4-7 0.24239549999999999 0.24239549999999999 0.24239549999999999 ZT8-11 0.213876 0.213876 0.213876 ZT12-15 0.460677 0.460677 0.460677 ZT16-19 0.159365 0.159365 0.159365 ZT20-23 0.39317749999999996 0.39317749999999996 0.39317749999999996