In severe cases, the viral infection causes a high fever, bleeding into the skin, and necrosis (death) of cells in the kidney and liver. The damage done to the liver from the virus results in severe jaundice which yellows the skin. Hence, the yellow in yellow fever..
filter definition: The definition of a filter is something that separates solids from liquids, or eliminates impurities, or allows only certain things to pass through. (noun) A Brita that you attach to your water faucet to remove impurities from you...
Definitions. 1  Sampling is the process of selecting a representative group from the population under study. 2  The target population is the total group of individuals from which the sample might be drawn. 3  A sample is the group of people who take part in the investigation.