A hypothesis is an educated guess that gives explanation about an observation. It is not reputable to form a hypothesis by considering existing knowledge about the topic and making an inference.
Hypothesis precedes scientific research. It is a tentative explanation that must be verified by experiment.
Usually a hypothesis is formed after reading other studies pertaining to your question.
A hypothesis is different from an inference. While inference uses background knowledge of established facts to make its guess, hypothesis uses knowledge obtained from past similar research to guess about something that is yet to happen.
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