Most MP3 players are poorly made; I bought one and it broke after only a week of use.
After staying in London for a week, I concluded that most English people are snooty.
Hasty generalization is a logical fallacy of faulty generalization by reaching an inductive generalization based on insufficient evidence.
Hasty Generalization- Making assumptions about a whole group based on a sample.
Throughout history, populations have tended to expand up to a point, contracting violently when resources become strained.