condition mean min max ZT0-3 29.47755 22.66895 36.28615 ZT4-7 12.51615 12.51615 12.51615 ZT8-11 16.13005 16.13005 16.13005 ZT12-15 0 0 0 ZT16-19 18.00595 18.00595 18.00595 ZT20-23 20.04325 20.04325 20.04325