condition mean min max ZT0-3 41.36775 25.3612 57.374300000000005 ZT4-7 9.46787 9.46787 9.46787 ZT8-11 2.86555 2.86555 2.86555 ZT12-15 0 0 0 ZT16-19 7.9708749999999995 7.9708749999999995 7.9708749999999995 ZT20-23 14.115200000000002 14.115200000000002 14.115200000000002