condition mean min max ZT0-3 25.781599999999997 23.0733 28.4899 ZT4-7 14.982949999999999 14.982949999999999 14.982949999999999 ZT8-11 9.55763 9.55763 9.55763 ZT12-15 0 0 0 ZT16-19 18.000799999999998 18.000799999999998 18.000799999999998 ZT20-23 23.3383 23.3383 23.3383