condition mean min max ZT0-3 677.533939 677.533939 677.533939 ZT4-7 900.9328415 900.9328415 900.9328415 ZT8-11 929.2033590000001 929.2033590000001 929.2033590000001 ZT12-15 914.8640015000001 914.8640015000001 914.8640015000001 ZT16-19 837.8871085000001 837.8871085000001 837.8871085000001 ZT20-23 942.4375605 942.4375605 942.4375605