Political science
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Replication is when you copy something. Example: Jimmy picks up a rock and throws it at a wall. Then his friend John picks up a rock and throws it at a wall. John has just now replicated or copied Jimmy's action. The process of copying a double-stranded DNA molecule (DNA replication).
The Stem and Leaf plot was first used by John Tukey around 1977 in a study of volcanos. John Tukey was a mathematician and statistician who is credited with first using the term software to describe the programs that run on computers.
sample is the population we make our study about them.
Differentiate between work study and method study.
The study of coins is called numismatics.