condition mean min max ZT0-3 2213.8999999999996 2213.8999999999996 2213.8999999999996 ZT4-7 3008.7 3008.7 3008.7 ZT8-11 2670.2 2670.2 2670.2 ZT12-15 2394.45 2394.45 2394.45 ZT16-19 2252.3 2252.3 2252.3 ZT20-23 2139.8999999999996 2139.8999999999996 2139.8999999999996