condition mean min max ZT0-3 6.14072 6.07954 6.2019 ZT4-7 4.36795 4.36795 4.36795 ZT8-11 4.244785 4.244785 4.244785 ZT12-15 0 0 0 ZT16-19 5.55548 5.55548 5.55548 ZT20-23 6.24722 6.24722 6.24722