condition mean min max ZT0-3 3866.15 3866.15 3866.15 ZT4-7 2214.5 2214.5 2214.5 ZT8-11 2155.8999999999996 2155.8999999999996 2155.8999999999996 ZT12-15 1908.25 1908.25 1908.25 ZT16-19 2617.75 2617.75 2617.75 ZT20-23 3358.65 3358.65 3358.65