condition mean min max ZT0-3 11.367750000000001 11.367750000000001 11.367750000000001 ZT4-7 10.183775 10.183775 10.183775 ZT8-11 8.706305 8.706305 8.706305 ZT12-15 12.1755 12.1755 12.1755 ZT16-19 14.909 14.909 14.909 ZT20-23 11.54225 11.54225 11.54225