condition mean min max ZT0-3 1.3981765 1.3664779999999999 1.429875 ZT4-7 1.3805299999999998 1.3805299999999998 1.3805299999999998 ZT8-11 1.046894 1.046894 1.046894 ZT12-15 0 0 0 ZT16-19 1.446645 1.446645 1.446645 ZT20-23 2.10937 2.10937 2.10937