condition mean min max ZT0-3 71.24613333333333 51.413349999999994 84.03425 ZT4-7 59.691500000000005 59.691500000000005 59.691500000000005 ZT8-11 47.8594 47.8594 47.8594 ZT12-15 53.76255 48.897149999999996 58.62795 ZT16-19 69.61765 69.61765 69.61765 ZT20-23 89.23419999999999 89.23419999999999 89.23419999999999