Answer:
Anecdotal evidence is a factual claim based solely on personal observation and gathered in a non-systematic or casual manner.
More information about Anecdotal evidence:
The term anecdotal evidence can be broken up into two distinct halves, both of which are words you are more than likely familiar with. Evidence is proof, in some form or another, offered to defend a belief or a claim. Anecdotes are short stories told to illustrate a point or support a claim. In many cases, anecdotes are presented as being true, representing real people and events. Anecdotal evidence, can be defined as testimony that something is true, false, related, or unrelated based on isolated examples of someone's personal experience. Anecdotal evidence is very popular in the advertising world. Every time you see a claim about a product's effectiveness based on a person's personal experience, the company is using anecdotal evidence to encourage sales. There is a big and distinct difference between anecdotal evidence and scientific evidence, or proof based on findings from systematic observation, measurement, and experimentation. While scientific evidence can be independently verified using the scientific method, anecdotal evidence cannot. Anecdotal evidence is often offered when there is an absence of scientific evidence or in an effort to refute scientific evidence.
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WORD OF ADVICE: I would recommend paraphrasing your answer [if you use this info] because most schools have programs that can do a plagarism check and that could cause you to get in trouble if you use this info word-for-word :)