condition mean min max ZT0-3 7492.3 7492.3 7492.3 ZT4-7 9359.3 9359.3 9359.3 ZT8-11 9524.0 9524.0 9524.0 ZT12-15 9092.1 9092.1 9092.1 ZT16-19 9415.150000000001 9415.150000000001 9415.150000000001 ZT20-23 7949.700000000001 7949.700000000001 7949.700000000001