3. Insufficient Sample Fallacy
The Fallacy of the Insufficient Sample (also called the “hasty generalization”) is committed whenever an inadequate sample is used to justify the conclusion drawn. In a Biased Sample, people are pulled from a non-representative group; in an Insufficient Sample, not enough people are polled to yield a statistically significant result.
I have worked with three people from New York City and found them to be obnoxious, pushy, and rude. It is obvious that people from New York City have a bad attitude.
Observations of three people are not sufficient to support a conclusion about 10 million. Bad luck could account for meeting three bad people. Try this one:
After living and working in New York City for 12 years, I have met thousands of people and, with very rare exceptions, I have found them to be obnoxious, pushy, and rude. It is obvious that people from New York City have a bad attitude
Anecdotal
Using personal experience or an isolated example instead of a sound argument or compelling evidence.
The Gambler’s Fallacy
Thinking that there are streaks on independent items, such as dice rolling.