Nonexperimental designs attempt to test differences among variables, and experimental designs attempt to establish cause-and-effect relationships.
Nonexperimental designs include research designs in which an experimenter virtually both describes a collection or examines relationships among preexisting agencies.
Experimental studies examples are unique, relying on the kind of experimental research design this is being considered. The most basic instance of experimental studies is laboratory experiments, which may additionally fluctuate in nature depending on close to research.
The experimental method includes the manipulation of variables to establish motive and effect relationships. the important thing features are managed methods and the random allocation of contributors into controlled and experimental corporations. A test is an investigation in which a hypothesis is scientifically tested.
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Answer: I think its vikings!!!
Explanation: Five hundred years before Columbus, a daring band of Vikings led by Leif Eriksson set foot in North America and established a settlement. And long before that, some scholars say, the Americas seem to have been visited by seafaring travelers from China, and possibly by visitors from Africa and even Ice Age Europe.
Spain controlled most of the land in America by the mid-1500's
Answer:
A Teapot
Explanation:
Treatment would also work
