condition mean min max ZT0-3 37.734624999999994 31.2044 44.264849999999996 ZT4-7 23.473599999999998 23.473599999999998 23.473599999999998 ZT8-11 59.1923 59.1923 59.1923 ZT12-15 0 0 0 ZT16-19 64.89195 64.89195 64.89195 ZT20-23 56.0169 56.0169 56.0169