condition mean min max ZT0-3 2373.25 2373.25 2373.25 ZT4-7 2146.5 2146.5 2146.5 ZT8-11 2129.85 2129.85 2129.85 ZT12-15 1957.9499999999998 1957.9499999999998 1957.9499999999998 ZT16-19 2187.2 2187.2 2187.2 ZT20-23 2439.8 2439.8 2439.8