condition mean min max ZT0-3 7.22573 7.22573 7.22573 ZT4-7 2.313685 2.313685 2.313685 ZT8-11 0.7882995 0.7882995 0.7882995 ZT12-15 2.03095 2.03095 2.03095 ZT16-19 7.57061 7.57061 7.57061 ZT20-23 11.13115 11.13115 11.13115