Correlation or
Causation?
1) There is a positive correlation between
sleeping with the light on and being
nearsighted.
2) There is a positive correlation between
the number of cigarettes smoked and the
probability of developing lung cancer.
3) There is a negative correlation between
owning a cell phone and riding the bus to
school.
4) There is a positive correlation between a
female's age and the number of children
they have.