A phone company determined that a higher income indicates that a customer has a more expensive calling plan. What does the analysis show?
1)There is no correlation between income and calling price.
2) There is a correlation between income and calling plan price. There may or may not be causation. Further studies would have to be done to determine this.
3)There is a corellation between income and calling plan price. There is probably also causation. This is because there is an increase in calling plan price with an increase in income.
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2 because they're related, but one isn't caused by the other.